Tom writes in and shares this new Matte Box find. Product description shows dual 4x4 filter trays (only one rotatable). [Thanks Tom] Comes with height adjustable 15mm rod clamp, Top and Side flags, and a couple of black-out neoprene donuts. No swing away design here, but It does look much lighter than the ePhoto MatteBox (seen here).
This titled 'Compact Pro Matte Box' also lists fairly cheap with more images found at $150 bucks + Free Shipping on eBay (Click Here).
Compact Pro Matte Box