$40 from a garage sale!  What a bargain.....

Not sure if you have seen these guides, but they are the 1st reference for any pin repair...

http://www.pinrepair.com/sys37/index.htm

For your display issue:

http://www.pinrepair.com/sys37/index3.htm#display

Re parts, depends on what you need.  There are a number of great online shops locally (in Aust) which carry most parts (pinballspareparts.com.au, RTBB.com.au just to name a few!)...

Good luck!