if I may ask....which PAM?
5135 is 51mm tip-to-tip...my guess is that any 44mm PAM will be at least that (and larger as Frank mentioned)
If a new 5135 did not fit you right at your AD, I guess it was becuase of the stiff new strap, as mentioned above and
also per my own personal experience. Try to find a used 5135 - just to for trying out. It should fit OK.
You even have larger wrist than me. My wrist is 6.5" and it fits perfectly after the strap is worn in (and I am even talking
about the stock strap - not just the custom one I had made.
Best of luck. Milos