I went with a PM faceplate over the SE air cleaner backplate with a Arlen Ness stainless steel filter. I haven't seen many of these and it was much less expensive than the full PM or RSD cover. I like it. I also like some of the other originals that others have posted. Very creative.

 

Here's mine

 

Yeah, I have a guy locally. But I've also seen them turn up on eBay from time to time.