Actually I have a couple good rim companys that I have seen alot of Lambo's use. Look at
www.mayawheels.com,
www.asantiwheels.com,
www.avuswheels.com now if you look at the gallery's you will see murci's and G-cars. Also I am able to get wheels and tires thru the wholesaler for the east coast, which is Dealer Direct. I can get every kind of wheel and tire combo you can think of. If you need any help getting them or any info that might help let me know and you can put 19x8.5 and 20x13 on a Diablo. I personally have a set of avus af-mo2 on my murcielago.