There are *some* 1.8T 4x4's out there, none of them vRS though.
I've had one from new. I've found it hard to find anything to replace it with!
Things to bear in mind if you go for one over a vRS:
-With the 4wd system it is 100kg or so more than the FWD.
-As standard it sits 25mm higher than even a normal octavia!
-Discs are smaller, but the calipers are the same as the vRS. Upgrading is just a case of fitting bigger discs and a part that moves the calipers outward.
-Standard power is 150bhp, but easy to chip
-The boot isn't as deep because of the rear diff (but is still cavernous).
With any of the 1.8t, check whether it has been run on long life (20k) servicing intervals. When they get to around 80k miles the sump gets clogged. If it has been, it might be worth dropping the sump to clean it out when you get the car.