I really.... REALLY wish someone would make this kit with some sort of regularity. I keep getting outbid on fleaBay everytime I see one pop up there (like one every 3~4 months or so...uggh). I want to convert my "Mad Max 2" Interceptor into the original car form, but I think only one person makes that conversion kit, and you can't get it anywhere else.
I´d suggest to make the parts by yourself rather than messing around with pricy parts on "fleaBay". I was looking for the transkit by myself for a while and I´ve searched for as much information as I could find. After seeing a few builds with a transkit, I didn´t want it anymore. I didn´t like the fit and the quality of the resin parts that I have seen. I ended up making the parts from sheet styrene and it looks way better/sharper/crisper than any Mad Max resin stuff that is available out there. It wasn´t even difficult.
I realized there is an odd thing going on for some time now. People start to forget about their scratchbuilding skill because there is too much aftermarket stuff available. It took me two evenings to make the parts for my model. In the end this "feels" much better than buying expensive resin stuff, which probalby needs the same amount of time to make the parts fit and look good on your model.
No pun intended, just a heads-up suggestion about getting back to the roots and creating something to be proud of.