[Reece]

Not familiar with that particular idler wheel, but you might be able to repair it cheaply. In a lot of cases an idler wheel is just intermediate between the motor shaft and the inside edge of the turntable. The motor shaft bears on the rubber surface of the wheel, and the wheel on the turntable. If this is so in your set, then the actual diameter of the idler wheel is not important to turntable speed. When the idler wheel has a not-too-thick rubber tire on it that has deteriorated, in some caes you can remove that and find a large O-ring at the hardware store to roll onto the idler wheel, and it will work fine. Some wheels are like a bicycle wheel with a groove so the ring will stay by itself. If not, some super glue would hold it. If it's a really thick (in diameter) tire, maybe not. Worth a look. In any case, the changer needs a lot of good squirts with CRC electronic cleaner (auto parts store) and then light oil and white grease on appropriate parts. Work a little light oil down into the "oil-less" motor bearings. Keep any oil off rubber parts.