I haven't read Terry's article but I assume he was talking about top "name" gunsmiths. If you want to use the very well known smiths then you likely will have to wait. There have to be lots of gunsmiths available who are quite capable of barrel installations and the associated work. Just takes a little looking to find them.

I had a rifle rebarreled last Spring and after the barrel was received the installation was done within about a week (after he completed work for someone who was ahead of me in the line.)

Jim