Up for sale here is this pair of vintage idler wheels. These came from a Saba TK-220-S tube reel-to-reel, and may work in other units. These are in good shape, and the rubber is still soft. Please be sure these are the exact idler wheels you are looking for before you buy them. Please see my pictures for details.
US shipping and handling is $5, and international is $18. All my small parts are set up for combined shipping, so just use the "add to cart" feature and then check out all at once, and it will combine shipping. If you have any questions, please ask.
I have more idler wheels and other vintage electronics listed--feel free to take a look!