P2.5 Indoor RGB Led Matrix Panel Board, 128 * 64 Pixels, 2.5mm Pitch, 1/32 Scan, Full Color HD Video Wall LED Display Module (RGB, 320x160mm): Amazon.com: Industrial & Scientific
Medium 16x32 RGB LED matrix panel - 6mm Pitch : ID 420 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits