Gotcha. Well, I'd of course love for the money to go to Jim, but here are a couple of popular manufacturers (you have probably already seen them, and I don't know that they'd match your speakers):
http://www.standoutdesigns.com/
http://www.salamanderdesigns.com/products/av.jsp
Warning - Decloaking 
I can vouch for the incredible build quality of Salamander Designs. I have 3 Synergy Single wide cabinets (1 tall one for my AV components, 1 matching one for my media, and 1 half-height one for future Amplifier expansion).
I love Synergys because they can be customized extensively. I own the white maple ones with black remote control pass-through front plates.
Downside is that they are not cheap, but this high-end quality (NOT IKEA!!!), and as such they are worthy matches for the craftsmanship of Salk speakers.
http://www.salamanderdesigns.com/html/downloads/syn_brochure.pdf Cheers,
Frans
