Vintage Pocketwatch Parts

Over the past few months I have been receiving a significantly increasing number of emails from people looking to buy a certain watch part or other.  Some of these are from hobbyists, or just watch owners, looking for something for their own watch.  But some are from watchmakers who are I'm sure already familiar with, and have apparently exhausted, the usual sources.

I don't deal in watch parts at all.  There's several reasons for this, but the main point I take away from the email I have been getting is that spare parts are drying up - fast.  It would seem that over the next few years it is going to become vastly more difficult to repair even relatively common vintage makes.