Pity, well if I come across an earlier version...
You might get away with a 4K7 dual ganged sub-min pot, just parallel both sections.
This will give ya 2K3 or thereabouts. I would doubt that the additional 300R will make that much of a difference.
Are there no markings on the original pots that would give you a clue as to the manufacturer? Or have you tried a Fender agent for the originals, or a pointer to a supplier? the originals might not be that expensive anyway.
rgds