Any decent technician can install a jack on the TV that you plug some transmitter part of the headphone into and then you are done.
You are right that Radio Shack or other makers will have nothing to do with this. It's something your first year electronics college student should be able to do for you. Figure at most about 200 bucks.
I would like to purchase a simple (no interest in stereo) wireless headset for a Panasonic TV model TC-L37U3 made in 11/2010. Neither Panasonic or the Shack can assist. The only requirement in no sound from the TV in the room and sound control from the remote. My son won't listen to my programs. Therefore, the set is useless to me unless I can locate such a unit or modify something that is available.