Here's a link to kits that are already put together. Most of these are more than you need since you are only looking for control for 1 device, but it gives you an idea what you need. You need an IR target, an IR hub that has it's own power adapter(sometime it is extra), and an IR flasher. The IR flasher goes over the IR port on the TV, then you could cover that with black tape to keep the remote from hitting it. Then you connect that to the IR hub and then the target to the IR hub. There are many type of targets so you could buy whatever works best for you. I'm new to all of this myself but have been doing a lot of research on IR for my installation. You should post over in the Remote control forum also in the AV control section. The people there should be able to help you on the exact hardware options that would work best.http://www.parts-express.com/wizards...TOKEN=57521602
Another option I thought of would be controlling one of the TV's with RF instead if you happen to have a Harmony or other remote that supports RF.