There are at least a couple of features of that pin which can be costly.

The radiused annular straight knurl on the head and the spring are the first features that show up for me.
Next is the fitting.

The amount of taper looks similar to standard taper pin taper, so a taper pin reamer might help fix your issue with the pin journal - but I'd have to look and measure to be credible. If not, a one-off tapered reamer could be made for your application and a properly proportioned replacement replica pin made to suit.

The keeper spring should be fitted to your escutcheon plate (thickness for the groove) etc, and that knurl *can* be reproduced.
It's just time. Someone's time.

Cheers
Tinker