Walther, Ruger and SIG all make small .22 pistols that would work for you.
I would avoid the single action target pistols like the large Ruger and Browning for what you're trying to do.
The Walther PPK/S in .22 would be perfect, but DAMN they're expensive. $600 at Gander Mountain.
OTOH, it would be a lifetime investment, and it holds it's resale value extremely well.