I make folding knives myself and to order, any forms and sizes. I also make fixed blade knives, but not very often.
I don’t forge and heat treat my knives myself, as there are masters who have been doing it for years and show a constant and good result. I normally buy steel at a famous in Ukraine heat treater called Instrumentalschikh.
I mainly work with carbon, titanium, and powdered steel M390. One more field of mine is making kydex sheaths
p.s. I do not make cold arms!