There are plenty of 700c wheels available with a 135mm rear spacing. In fact, I just bought a set for my cross bike. Touring bikes and hybrids (as well as some cross bikes) typically take a 135 rear since it is a little stronger (with less dish) than a 130 mm rear. Here is one at $60:

http://www.universalcycles.com/shopp...&category=4595

There are plenty and plenty of choices out there.