Trying to find replacement roller assemblies

The assembly is stamped Production Enterprises. Hialeah FL

I measure the unit as 11/16 wide, 1 & 1/2 inch high including roller 1 & 3/8 without roller.

The unit measures 3 & 1/16 long. Y best guess would be it was installed approximately 1978.

Thanks

Jack

Maybe these are all standard, but I thought maybe I should add that it measures about 1 3/8" from the end with the adjustment screw to the center of the top screw that attaches it to the bottom door drame.