Hi Carl,
One could possibly make a slip ring out of a hair dryer or curling iron work. The challenge is that the slip ring is likely molded into the housing and may be difficult to separate it. It may also be a challenge to center it up on the turntable. Since no two models are likely to be the same, it is hard to give advice on doing this. Still, if you can get a hair dryer or curling iron for a few dollars, it is worth a try.
Thanks
Allan