I should be able to find Harmony at local Fry's.
here's the thing. I have 2 Rokus, high end and low end editions. High end one is in living room, with the fancy remote for Angry birds. the low end one is in my bedroom.
so far, and I have no reason to doubt response provided - remotes are not interchangeable, and low end remote does not work on high end Roku. I tried. Also, I have not seen any IR ports on that low end remote, looks exactly like high end one, with different buttons layout. I doubt it is IR remote, but I'll double check tonight. I do not see any point in buying a 3rd remote. I'd rather buy Harmony and run all my electronics off it, as it looks like Roku's to stay with me for a while.