David, thanks for the leads.
Now on its fourth roll, the AZ-1 seems to be reliable enough except for a small quirk: the film advance lever doesn't return by itself. At first I thought it was jamming, but I think this is all it is. After you push the lever to the right with your thumb, you have to pull it back to the left before shooting. I can possibly put up with that (see if it frees up with yet more use?), replace the light seals and mirror foam myself, and save the repair money.
Otherwise it's a fairly nice camera, with one of the better SLR viewfinders I've come across. And it came with an assortment of EBC primes including the yummy 35/1.9.