im afraid, not that Ive seen
most of the "wireless" kits are more than that whole system - basically you are paying for 3 boxes - a transmitter at the amp end and 2 receivers, one on each speaker.
they dont really make the speakers "wireless" but just eliminate the wire from the amp to the speaker - you then need a power socket and another cable to each speaker to power the internal amps in each receiver unit
I was gutted when I found this out - it totally contradicts what they are trying to sell - the fact that the rear speakers still need to be plugged into a power socket defies the whole point. I had to make do with a 2.1 system...
Wouldnt go over it, go under it....thats what i did, and i'm using fairly chunky cable.
I did my entire room in 3 hours.....i know that sounds alot, but ive got cast concrete walls.....so it was skirting boards off, groves cut, cables in, and boards back on !!!!
My main stumbling block is that I have a door way to get past for the Right Rear speaker. Guess I'll just run the wire over the door frame or something.
Cheers guys.