For all you RTR fans, I don't know if you've seen these or not. They look like pretty nice covers and they've been at it for quite a while. Here's a link to an eBay listing and their own website. I'd think they'll do custom work and I'm asking about speaker covers.
http://www.ebay.com/itm/AKAI-4000-D...370001?hash=item3f603a4091:g:my8AAOSw14xWF6tE
http://hvmreelcovers.yolasite.com/
http://www.ebay.com/itm/AKAI-4000-D...370001?hash=item3f603a4091:g:my8AAOSw14xWF6tE
http://hvmreelcovers.yolasite.com/