What about GT lights using projectors! Like this...
These look pretty good too...
This thread has a pretty easy looking tutorial on how to do the GT style lights.
http://forums.rennlist.com/rennforum...hts-guide.html
Probably a process that you are already familiar with, but they make it look so easy!
I think the fiberglass buckets could be done with a little cardboard or foam and some fiberglass.
I do enjoy the work you put into those Porsches!