I think Makerfarm are the only supply in US/Canada,
But since you looking for a board, maybe a duet is a better option.. I own a radds/raps128 and its working nicely but if I had to buy another it wont be a radds there was a lot of firmware support (RRF) when I brought it but now its dead... firmware support (RRF) are kinda dead except last week where DC42 give us a untested build but I dont think this will be every time he is not taking the job of supporting the board so there will be no more stable version and the creator of the board do not do firmware support and as told he is more toward marlin/repetier support than toward ( RRF) and its sad if you consider RRF is a better 32 bit option.
Its just an advice the board still good and work too but you will be stuck on untested release if you chose RRF as firmware or old release ( they still working good but not all the option of the new build)
