PJ1 also makes a flat black paint for exhausts.

 

These come with a high temp wrinkle finish powder coat.
Any dealer that offers Rush can order them for you. Online dealers such as J&P carry them, also some of the sponsors on this forum can assist.

Black Replacement Head Pipe Heat Shield
( Stock Replacement ) MSRP - $157.45
#18610HS - Sportster Compatible w/18 & 29 series muffler

 

I used paint on mine, except for a touch up every now and again it has worked great and has a nice ceramic look to it.

 

Had entire exhaust system for touring ceramic coated for $160 so I'm sure shields would be 1/3 the price.