car-part.com has a pretty good JY database.
I have a tire machine, and aim for tire + wheel deals on CL where I can separate the two, and get most/all of my cash back by selling what I didn't want.
Best scenario is when someone has good rims with bald tires, and disposing of the tires is too much trouble, and the assemblies sell for pennies. Searching can be kind of rough as they might say "tires for sale" then when you look at the pic they're mounted and, oh sure, the rims are included.
4x100 14" is so popular you'll find them anywhere. Saturns, escorts, etc. Just make sure your center bore hole is compatible.