After buying 2 replacement remotes for your stick I, and multiple others I know, stopped using Roku in favor of Chromecast. Nobody likes paying 67% the price of a device for a replacement part but here's an idea:
MAKE A UNIVERSAL IR+WiFi REMOTE that turns the TV on, selects inputs, controls VOLUME, and operates the Roku Steaming Stick. Charge $40 for it and watch your data team congratulate the employee who first forwards this up the chain.
Stop being assholes and make something people want, not have to buy.
Roku has made remote with wifi and IR for TV's for over three years. You can purchase it separately for $19.99 at walmart, best buy, and on-line from amazon. This remote won't work with 3500 sticks, nothing will accept an original 3500 remote which isn't available any longer.