Are you sure that a good 40Mhz(don't know if it's legal in your country) transmitter and receiver can't penetrate it?
If not, or if not want to use wireless, then it would surely be possible to control the WT with a wired controller, like a ps2 controller.
I think you would need to use the serial pins on the WP controller, not sure. I never did something like that before 
I'm sure that there is people out here that know much about that.