First off, welcome to the forum. As far as a racks I don't have too many suggestions for large burb racks, however there are many decent quality cheaper LED's on places like ebay, I have some myself and while not the best quality they are pretty good and very very cheap compared to some of the 200 or 300 dollars per light ones.
Anyway, looks a lot greener than where we live, good luck with your build, always like the look of suburbans with racks and lights, very functional.
Cheers,