If I may add to this conversation (and much can be seen in the other threads on the same topic), GB has some seriously ugly history. He took money up front, and didn't deliver. He would disappear from communication and ignore problems. This caused serious consequences with his reputation and his friendships.
He has, on numerous occasions, publicly apologized for his past behaviors. Recently, he has posted saying he intends to correct his previous issues, and so far I have seen him do just that. In the last year or so, he has moved to the "drop" method of selling, and closed his books. This prevents the main issue of taking money and vanishing.
To acquire a custom Shamwari, my personal recommendation is to be patient. You may land an IG drop. If you land a drop, it will take 1 week to process and 1 week to arrive. You may find one second hand. IG and BF are the best spots to look.
Be on the lookout for the "field grade" Shamwaris that will go for sale on his IG in the next few weeks to months.
With regards to placing custom orders, I have had friends who placed custom orders, but they can take up to 18mo-2yrs to acquire. I currently have a custom order in with him, but that is likely due to my "pull". As much as I don't want to admit it, he is probably helping me out for my YT and IG advertising of his knives. I will let you know how this goes.
At the end of the day, his knives are spectacular. The Shamwari is EDC perfection and it deserves this reputation. Gareth is on a mission to improve his reputation, and I have seen him be very communicative and friendly in the past year. I think it helps that now his brother Jason is helping with the process.
I am personally working on a solution to the problem of limited Shamwaris. Trust me. Stay tuned!