Also, the only archery shop I know of in the area is backroom archery. I'll ask my dad if he has an update on his extra bow string.
3325 Regional Pkwy # 8 Santa Rosa, CA 95403
(707) 575-3886
http://turrasbackroomarchery.com/Hours
11:00–7:00 Tuesday thru Friday
10:00–5:00 Saturday
**Pro tip: Don't mention Amtgard at that place unless you want a lecture about how you're going to kill someone.