For what watch? Which leather type?
Why do some people think other members are bloody mind readers? If Canadian isn’t a problem, then if he has what you’re looking for, try Aaron Bespoke (aka Combat Straps).
As mention it is really based on the watch.
Attila is a great strap maker for the high end watches in the Los Angeles area. google him and you will find a link to his site. ATTILA ASZODI straps attilacustomdesigns If you are going sporty Panerai vintage style Daluca Straps. Bill