PB Tech do the 7260 so I might get one on the weekend - http://www.pbtech.co.nz/index.php?z=p&p=NETINT2452281&qr=pspy&ref=pricespy
As for the poor signal, there is not too much that can be done, as the aerial wires are in the body (as previously noted) and not in the screen.
Just a note on this. I haven't opened my unit (that timbosan kindly sold to me at cost), however, looking at the packing slip it appears that the wireless card may be a M.2 form factor rather than a HMC form factor so the above card would not fit. Anyone else opened theirs and looked?
Would be interested to know too. The default wireless card isn't great, unless you are really close to the router.