Looking for Dutch Beaumont 71/88 rifle bolt screw

[mtenenhaus]

Hi, Dear friend has a Dutch Beaumont 71/88 rifle but it's missing the bolt screw that must be removed to disassemble the rifle. It's a really nice looking rifle and looks in my opinion to be otherwise completely stock and in very good condition

I checked Numrich and Sarco but they're out of stock, I also checked Jack First and they don't list it either.

Anyone know where i might find one? thank you