Hammer for 16 ga 0 frame

[MIKE FISHER]

I'm a new PGCA member and have a field grade 1885 Parker 16 ga, 0 frame, s/n 46155, that I need a right hammer and screw for. Attached are photos of the Parker, with the the left side showing the Parker hammer pattern I'm looking for. As you can see it's a field grade gun and a pretty plain pattern. The right side photo shows the non-original hammer I need to replace. I also need an original pattern screw for this hammer.

I have tried Numrich and Dick Chubb, but both are out of stock. I assume Tom Carter might be able to provide the screw, but can anyone suggest another hammer source? Or is posting on Wanted to Buy my best bet?

Thanks.