I am looking for the rails for a Delta Unifence. The model is 10" Delta Platinum Edition Contractor Saw (don't think it matters).
The differences in the fence rails are in the configuration of the extrusion where it meets and mounts to the saw table. The old style has a solid channel with unthreaded bolt holes- making it a real pain to mount, while the newer style has a T- track like slot on the back so it is much easier to mount and position. Both have the same top and large fence casting lock T Slot. I have an old, used 52" rail I would sell.
How much do you want and where are you located?