I am looking to make or buy a horizontal sheath with fire steel and sharping stone holder for a gerber big rock. Anyone have any plans, or places for me to go?
Before you get the usual response to your first post, I'll go ahead and say it... You might wanna go introduce yourself in the Intro section just to let us all know who you are and where you're from... It just helps people warm up to answering questions faster.
There are several online leather suppliers, and lots of local Tandy stores to buy leather and supplies from. You are going to get lots of different opinions on suppliers, but I have a Tandy close to my house, so they are my choice for convenience.
Get heavy (8-10oz) leather. And when you are designing, especially for horizontal carry, you have got to design in some good retention. Whether it is a good tight wet-form, or a snap-loop is up to you.