I don't see a gunsmithing forum so I hope this is ok, as it's not a gun building question.
A rifle I'm considering buying is missing two parts of the tang sight. The sight pictured below is what it SHOULD look like. There are four parts pictured. I'll use my terminology though others may use different terms.
No. 1 is the staff: No 2 the aperture (eye cup): No. 3 a beveled/dovetailed female part which the aperture screws into (this is the lighter, silver colored part you see with the hole in the center): And No. 4 the slider which slides up and down the staff for elevation adjustment, and which has a corresponding dovetail to accept the female part.
The two parts missing are No's 2 and 3, the aperture and dovetailed female part the aperture screws into.
Should I purchase the rifle I need to factor in having someone making these two parts, or modifying similar parts available from a supplier. I don't need a price estimate at this time but I'm trying to determine if it's reasonably doable, forget about it don't waste your time, or something in between.
Thank you.