Best place to get 650c wheels

I have my original TTRs from my 2010 Felt B12.  I bought some Zipps and kept the TTRs as "training wheels" but alas they have sat in the wheel bag since I took them off.  Swapping out the brake pads every time I went from race to training mode proved to be too much of a PITA.  Plus I do most of my training rides on my roadie.

There are still a lot of 650c rims out there, they just don't get built into wheels all that often. Pitty -- I find them quite useful myself. If you have a knowledgeable friend, or if you have the knowledge yourself, you could buy the parts and build the wheel yourself. It's not really all that difficult, mostly it just takes patience. As already stated, Velocity has some good rim choices in 650c. And when you talk to the shop (if you order through them), make sure they know it's 650C, not B.