Yes you can.
A 35m cable - rather long but you can get them, or get two shorter ones and join them.
Kikatek stock 50m and 30 m along with many other lengths. http://www.kikatek.com/P114617/83859-C2G-50m-Cat5e-S...
There are plenty of ebay supliers too.
However, I would suggest putting an rJ45 socket close to the TV and another close to the hub and then wire between them with infrastructure cable. That will be a lot safer and if you can run r=through walls to shorten it, a 6mm hole is enough. Then a short patch cable at each end.
M H C
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