Other brands of wireless headphones generally work.(universal IR frequency is used)
I agree that the Toyota headphones are not that comfortable.
I don't like mine either. But, I don't have that luxury of enjoying my RSE in my Hilander.
My guess is that the O/E's are rebranded Audiovox's, as my particular RSE is a Toyota labled Audiovox unit. My DVD player is separate in the center console with just screen overhead.
Is this your setup???
The Originals can be had for $39 msrp and even less $$ ,that I've seen at online toyota parts stores.
goodluck
LT