Welcome to the forum. There is a very respected vendor/modder right there in Colorado. Member name is RMM. Here's a link to a thread for his store.
EDIT: Going 18650 with a button is going to make achieving less than 115 mm a challenge. This host with a driver and LED of your choice is all I can think of in the states. You may want to think about what tint you would like. Here is an ANSI chart with Cree's tint codes overlaid. It's from this thread.
