I don't know that I am into buy spares, but I am very disappointed in this development. One of the best things about dcs has been that it has always been backwards compatible. Moving to a combined interface unit always seemed like a logical step. I simply have a hard time understanding why the new unit wasn't made to be able to communicate with the existing remotes. Perhaps we will say a change, or a plug in module that will allow for use of the original remotes via the dcs plug, as mentioned above. Software updates though would stall, so the remotes would still be on borrowed time.