Try Numrich for parts, here's a parts diagram, along with a list that may help.
http://www.gunpartscorp.com/Manufact...6/85-42015.htm
You can also look up a serial number on Taurus' website:
http://www.taurususa.com/find-model.cfm
I know how you feel regarding the hold time at Taurus. I was once in search of a spring for a Model 94, and spent over an hour on hold. I finally gave up and used a spring made for a S&W that I modified a bit. I hope I never have to call them to get a gun repaired.