Know where i can get some 1/8" thick plastic sheets that i can cut and make into flat center caps for my wheels?

The current caps stick out a good 4 inches and i get tired of having to take them off to take the wheels off. Twisted off several screws that hold them on.
I can have it chromed for a decent price but don't know where to find a sheet of plastic. Or a place that can just do it.

Any ideas?

Edit: there are sheets on ebay but they are mesh.

 

gah i think i posted too soon.. If you find anything helpful i'd appreciate it.
But if not. check this out.
http://www.emachineshop.com/download/index.htm

 

Not sure exactly what type of plastic would suit your project, but I bought a bunch of squares of black ABS platic off of ebay. Stereo shops use them alot...they're usually smooth on one side and textured on the other. Go to the ebay automotive section (ebay motors) and type in "ABS plastic"...

http://cgi.ebay.com/ebaymotors/ABS-P...spagenameZWDVW

 

That looks like exactly what i'm after. i can smooth off the rough side for a better fit.
thanks.
Grabbed 2 12"x12"x1/8" pieces

Can run em in black until i decide to paint the caps or chrome em.

 

mcmastercarr.com