Need Patchbox Installed

[BigSkyRambler]

Bought a nice flintlock SMR at auction. It had an odd shaped "grease hole" made of antler imbedded in stock. It got knocked out and lost while they were packing it. They are willing to pay costs of having patchbox installed. I think a banana style would be best. Can anyone here do this? If my hands were younger I might take it on, but that ship has sailed. I will ship stock in reinforced box along with patchbox, unless builder has one or wants to order one. Attaching before and after photos.

 

[BigSkyRambler]

Let me try a different tack. How much extra do you builders charge to install a patchbox? Auction house will pay me and I pass that savings along to whoever buys the rifle.