Center Cap Size?

[cflgm]

I'm close to pulling the trigger on a set of polished GMC 20" wheels for my Silverado...but obviously will want to get a set of Chevy center caps once I get them. Anyone know what size they are...and where to get them?

 

Here's the wheel...

 

[Matt09SLT]

SLP sells the wheels w/ the bow tie center caps; might contact them and see if you can just get the caps.

 

http://www.slponline.com/view_product.asp?...amp;BIG=81011-1

 

Matt