Amazon.com : Cavision 4" x 4" Hard Shade Matte Box with Textured Finish, Original Clamp-on Back Mount: 100mm, 2 Filter Stages, Two Metal 6mm Filter Trays. : Camera Lens Matte Boxes : Electronics
Cavision 3 x 3" Matte Box Package with 80mm Adapter MB3485S-80
Matte Box on the A1 at DVinfo.net
Cavision 4x5.65" Hard Shade Matte Box w/ Bracket, Top, Side Flaps & One Adapter | eBay
Cavision Matte Box Package for DSLR, AF100 & Black Magic
Cavision Matte Box Package for DSLR, AF100 & Black Magic
Cavision 3x3" Hard Shade Matte Box with Top and Side Flaps #MB3485S - Newegg.com
Cavision MB4510-H2EX 4x5.65 Hard Shade 16x9 Matte Box
Cavision 4x5.65" Matte Box Package with Rods Support for Canon Cameras MB4169-CXFCA-R
3x3 Matte Box Package with Flags and Swing Away Component with 15mm Bracket - for DSLR
User manual Cavision MB4169H2-M 4x4 Wide Hard Shade Matte Box MB4169H-2M | PDF-MANUALS.com
Cavision MB385PW 3x3 Matte Box with 2 Filter Holders MB385PW
Cavision MB4512-DSLR 4 x 5.65" Matte Box Package MB4512-DSLR B&H