Looks like they make a similar wheel to the GTA wheels. Very nice, but I'm sure they're huge money http://www.hrewheels.com/501/
Ha - I called HRE about wheels as I've been tryihng to find some GNX style in 17". The ones I was looking at (not these) were $1200 PER CORNER...for just the rims!! About had a heart attack. Makes the CCW's look VERY attractive. I did use this info to further my argument with the wife that the $2800 for the CCW LM20's in 17" are what my car needs!! $2800 is a helluva lot less than $4800!! Those are pretty sweet for those with mkorbidly obese wallets. I would bet they want $1000 a piece for 'em.
i had these on my blue T but i had the original 501's that were disontinued cost me a pretty penny...loved them just realized im sorry i jumped the gun i had the 504's not 501's but they look similar