Checkout this 16 x 32 RGB LED matrix panel! They have 512 bright RGB LEDs arranged in a 16x32 grid on the front. On the back there is a PCB with two IDC connectors (one input, one output: in theory you can chain these together) and 12 16-bit latches that allow you to drive the display with a 1:8 scan rate.
LED Dot Matrix Display Module 8x8 x4 MAX7219 4-in-1 For Arduino - Cascading Panel of 4 LED Dot Matrix Modules.
This red LED Tube Display offers integrated common-cathode drivers, as well as cascading and chaining capabilities to connect multiple modules together.