hi michael,
i'm from istanbul and we've similar problem here to register special project car with space frame chassis.
but, it's hard but possible to register if chassis and running gear from an donor car with documents used.
i suggest you to use gm s10 (front engine, rwd) as donor instead of vw bug.
you may take a look to my scratch built project @ sub-forum
i'm going to start manufacturing of bodyshell, but slabside or fia ?
regards,
ozgur