Here they are in no certain order:
1 For RCA preparation prior to getting the team together, I would pull equipment documentation and any history available via Google.
2 Search bulletin boards and user group pages for common equipment failures using Google. Verify these are part of your equipment maintenance plan.
3 Locate spare parts for obsolete equipment via eBay and Google
4 Locate new lower cost vendors and service centers for existing parts via Google
5 Identifying physical defects with picture of similar failure from Google images
6 Find equipment vendors websites via Google… it is not always so obvious.
7 Read about additional vendor, equipment, part or product characteristics information on Wikipedia
8 Follow your common vendors on Twitter to be in the loop with most recent product releases and updates
9 Read the blogs of people interested in the same topics or that deal with the same issues you face.
Read the various trade publication websites for articles that target the problems you are facing.