Dotte,
Keep looking on e-bay. I've found a few -- and bought a few -- Jon knows! Congrats on the machine. You're very fortunate that it is not stuck! There are a lot of tutorials on this site on how to clean up sewing machine parts, including the slide plates, hand wheels, etc. As you probably already know, be very careful what you use to clean the head of your machine. The surface with decals can be very delicate and some cleaners will take the decals off, or cause them to silver. I am still a rank amateur when it comes to these machines, but my son was a SM mechanic for 14 years, so I do have a big advantage there!
Jeanette
Jeanette