Source for tires to see what fits?

[cpd004]

So when you guys are trying to figure out what fits, where do you get a tire from to mount to, say, a Wheel Fit tool? I can't imagine Tire Rack, for example, would send out a bunch of tires for you to try only to send back what won't work for a full refund.

A neighbor has the tool, but no one close that I know of has spare tires laying around in the sizes I am leaning toward.