About two years ago, I contacted Katha Higginbotham (Dave Higginbotham's widow) about a replacement tang screw for my Lone Star Roller.

She replied that she had no idea of what parts are/were in the inventory pile. 

She sent me a picture of some screws that she found, but they were machine screws. I replied that a machine screw like she photographed was not needed but I needed a wood screw. 

She said she did not know the difference  between the various parts, what they were for, or where they fit on the rifle as she let Dave handle all of the "mechanical" work on the rifles.

When Shiloh sharps came out I was sitting at a table behind him at an Ohio Gun Collectors show and he was displaying for the first time. I bought 10 rifles from him, 9 in .45-70 and 1 in .45-120. They cost $325 a piece with the venier tang sights.
After he sold the company, they doubled the price of the rifles because they had a 3 year backlog and  they could. Single shot rifles are simple and shouldn't cost over $2000 to produce. These companies priced themselves right out of the average shooters market and wonder why they are going out of business now. Those rifles could have been sold for well under $1000 and if they had, more people would have bought them and they would still be in business.