Hi sorenluckins, great to see another Aussie on here (even though I'm actually technically not an Aussi but just an import

).
Not seen a scooby to Type 34 conversion before, pretty sure yours will be the first, I know a local Adelaide guy who would love to do the same but you're streets ahead of him already, will be an interesting build - would be great to see a build thread (BTW - you can start a build thread right here on type34.com by clicking on the 'build threads' link above)
Will try to answer your questions as best as possible.
1/ New door skins are not currently available and whilst there are a number of reproduction panels being made unfortunately door skins are not one of them. You could be lucky in tracking down a NOS one but then I would think that you might have more luck finding unicorns teeth. Best bet here is to either try and source a rust free door or get an experienced coachbuilder / panel shaper to repair the doors you have. Of course it goes without saying that this is not a cheap exercise, but then I'm sure you knew that before getting into restoring a type 34.
2/ There is no number 2!! (nice looking patina BTW

)
3/ Yes, full rocker kits are available from Jurgen Magdelyns / Carsten Clien, he also does wheel arch repair panels too. Carsten is a great source for Type 34 parts he will usually have what you need. You can also try Lars Nueffer and Karmannghia.de (whilst you are there you could also ask about door skins - you never know your luck).
4/ Unfortunately repro dash pads are not available, however there is a guy here in SA that can recover / repair them in the original style vinyl - the grain is not 100% perfect but it is the best option. Other than that you are probably looking to source a good used one. However it is worth bearing in mind that most have likely suffered the same fate as yours and are probably cracked from the sun.
5/ Sunroof clips are not impossible to come across, they do come up every now and then - again perhaps speak to Carsten or simply keep in touch with the Euro and US scene, however when they do turn up they don't hang around long.
6/ In a word no. The funky green ones are the only ones AFAIK. Main difference between Type 3 and Type 34 pans are seat rails and the rear cross piece at front of rear seat - you should be able to salvage these parts from your existing car.
7/ No number 7 (are you missing some fingers?

)
8/ There were some reproduction screens made a short time ago, there may be some still available although they all made to order. Cannot remember the details off hand but a search in the forums or over at thesamba might turn up some info
9/ For the 'parallel' sections I would personally look at making a former to shape the main profile over and then bending the returns on each side using a press brake. For the top most section where it curves into the roof you could do the same but you really need to know how to shrink / stretch metal correctly to be able to correctly form the curve and returns. With patience it is not difficult but it is not something that you cannot stumble through without understanding the basic principles. If you are interested in metal forming I would recommend trying to get onto Peter Tommisini's panel course. I did it here in Adelaide but he is actually based in your neck of the wood - Melbourne.
You can check out his site for more info -
www.handbuilt.net.au/seminars.html
From memory it was $380 for the two days including a BBQ lunch. (You will save that money in time on the first panel you make.) He also sells all of the tools you will need. With this info under your belt and a few tools you can easily make your own rockers / arches / door skins / etc (well maybe not easily but it is possible and you will know how).
HTH
Mick.