Jezzer mate,Why dont you just buy the cable and connectors and do the job yourself.U d probably do no worse than most of the (so called) engineers anyway and it would definately be cheaper than going wireless!
You are hardly likely to put any "noise" back into the network.You are only required to terminate a couple of ends as there is already a splitter(with spare output) fitted.You would nt be effecting any one else around you by carrying out such a small alteration!
(i await someones dissagrement)!