center caps for cup 2's

[freekazoid]

I got my 993 porsche cup 2's on my ghia, well at least my shop did. It looks good but the center caps I have wont fit on because they are concave in. I know there a a few of you here with modern porsche wheels, have you found any center caps that fit?

These are two pics I took today. The beam in the front is adjusted all the way up, will come down at least an inch.