Table saw rails and fences

[Bruce King]

I finally got my old fence out to sell it but I’m starting to wonder if the rails are compatible with other fences. The fence uses small nylon rollers that work fine once you get the eccentrics adjusted. So I’m thinking the rails could be sold separately. They are 74 inches long so called a 50 inch? Anyone have rails like this and if so which fence do you have on it?