Mike, I assume you're talking about ground school static models. These are really easy to make. Get some 1/4" sheet poplar from home depot, find a guy with a bandsaw, and cut out as many profile fuselages, wings, and tail sections as needed. Spray paint them if you want. Add elevator, aileron, rudder, and flaps, by hinging them with a soft metal pin like copper MIG wire, a paper clip, whatever. The control surfaces will remain deflected and can be repositioned easily. The cost shouldn't be more than $3 to $5 each, the problem is the time to make them.
By stacking the poplar sheets, you can bandsaw 5 or 10 fueslage profiles at once. That'll speed things up. You can airbrush or use decals to put your flight school logo on them.