I dont know where you are in LA, but you might want to call Mike Fennel and see if he can help you out. He has done work on both mine and a friends Firebird. The guy can fabricate just about anything and does complete restorations and custom builds. He is in Santa Clarita (up by Magic Mountain) so if you are not too far, you might want to give him a call.
The guy is extremely nice and does amazing work. He has been doing custom cars for about 30 years, so I am sure he has done cars for taller people before.. lol. And again, he can fabricate just about anything, so he might be able to at least point you in the right direction if you dont want him to do the work.