I bought shorter 32” rails for my tablesaw to replace my current 52” ones for my new smaller shop space. The generic brand didn’t fit my old fence which wanted the square tubing ¼” wider that was on my original 52” fence setup so the clamp wouldn’t grab.
I went to a metal supplier and got flat aluminum bar that was 1.5” wide and ¼” thick, drilled/countersunk holes and tapped mating holes in the 32” rail to build it out.
Works like a charm.
Cost me $16 to fix the problem