wireless headphone sender?

I moved my B&K pre/pro closer to the speakers-now about 8 feet away from my seat. I really don't want to use an extension cable across a big gap for any extended period of time. I also don't want to use a set of wireless phones instead of my Grado 200's. So does someone make a signal sender that will send to something with a headphone jack? Ratshack has something but I'll have to do a lot of jerry rigging to make it work - adaptors galore. Any ideas please? Dan