Ian, There are a lot of great leathersmiths here on TG and deals and Tenbrook is correct it is fun to make your own, one of my favorite things to do is working with leather and beading.
I will whole heartedly say that Mike's leather is worth the $ and is a perfect functional and comfy design with quality leather and should last you a lifetime and can still hand it down....
His work is all hand stitched and his prices are well below the quality and time that goes into them. He knows his stuff and is a wonderful gentleman to deal with, you will not be disappointed.