Hello.
I do not know the exact answer to your question, but I am ready to express my doubt that there is now someone who, on an ongoing basis, makes good DW on 7750/7753 PAMS.
No factory has been producing such models for quite some time, so I would doubt that TDs can provide such a part.
I recently bought a DW PAM from DSN for the 2824-2, which is a little more exotic, and I think there is a chance that it might also have a 7750.
But also, it is optimal to place also WTB, seems to be the main way to get something for sold out models now.
Anyway, good luck with your search!