Joe Keeslar has three very good youtube videos that will do a better job of explaining how to do wire inlay. There are also many other videos available on you tube. If you do a search on "wire inlay tools" it will give you many options on how to make tools and how to use them. Personally, I use tools made from old exacto blades and some old inexpensive carving tools that I have modified for my needs. Here's a link to Joes first video. https://www.youtube.com/watch?v=5ppTPPxDGh0
I do this mainly for fun as Winter projects. I do not normally buy and sell . The TC and the CVA are my own personal rifles and will eventually go to my son and son-in-law. I did do one earlier rifle that was bought as a practice rifle to see if I could still do this with any sort of ability(thirty year layoff) and I did sell that rifle to free up some income. I am currently working on a Traditions Penn. rifle and have a Hopkins & Allen lined up next for projects but with developing arthritis and an occassional case of the shakes, It's taking alot longer to work on these.