www.betterbodiesmotorsport.com has a good deal on wheels.
They run $1049.00 -s+h for a full set. I dont know if they are used or not it doesent say but there wheels look to be in pristeen condition!
You could also check out
www.911pcar.com
They are a Porsche dismantler company out of LA. I dont know if they sell wheels but you could contact them, Im looking at buying an engine from them and I have already boughten a set of calipers from them. There prices arent that bad compared to most places!