There is a yahoo group on vintage Elnas. Now and then some clever guy manages to have a few metal pulleys made. They are fitted with O-rings and work very well. If you have something like a lathe machine available, or know someone who has, there is a technical drawing of one with exact measures. I have had mine for something like 18 months now and it runs as smoothly as ever. These are well worth the time and effort it takes to get your hands on one, O-rings are low cost and easy to replace, and doesn't seem to develop a flat that easily.