Perhaps you could find a multispeed turntable in a used electronics shop that would work. Be sure that the one you get has two cartridges and needles on the tone arm, usually on a rotating fitting that can be turned with a very small handle sticking out from the front of the tone arm. 33rpm records use much narrower "needles" and are usually set up with the two sets of pickups needed to play the stereo tracks on this media.

    Lenco, a Swiss company, made turntables with continuously variable speeds from around 16rpm all the way up to around 90rpm. They sold a lot of their turntables to Bogen a US maker of multi speed record players for elementary school classrooms some time back, so that might be another place to look.

Dave