J1sys sells them but as Chris said, with the exception on a few older pieces, most of the boards have an ICSP header and the Pickit simply plugs into it. There are times when you may need to reflash some of the devices. Some of them have test firmware, others have both DMX and Pixelnet Firmware, sometimes new features are added such as the conductor, and of course, there is always the chance for a revision to fix a bug that got past beta testing.