I'm in the UK,
You are a tad far from me. Almost half way around the world actually..
Cant help much..
Being in the UK its more likely that you have access to more goodies than most of us anyway..
I get my parts from old machines such as printers, copiers, etc.
Old pre year 2000 copiers uses a lot of cogs spindles and clutches.. best of all, they can be bought cheaply from disposal places.
I found buying from the net although you get exactly or near to what you want, they are usually more expensive than buying the whole machine and rip them apart yourself