Where can I get a circular saw part?

Try www.Milwaukeetools.com I'm sure they can assist in some way like supply the part or put you on to a retailer in your area so tell em where you live.
Select on the left of the site where you're at. Then language [English I assume] You will be directed to the site for your area then top of page select 'contact' take it from there.
good luck
If your in USA this is from the UK.

bob
May 2007