My Contactor came from
http://waterheater.stores.yahoo.net/c25bnf240aco.html it cost $27.90 plus Shipping. Sometimes they tend to take a few days longer then you would like, but I've had pretty good response from them.
The Controller I have came from my Son, but I did get one similar to it on Ebay from Ebayer coldfusionx
http://cgi.ebay.com/Celsius-999C-Dig...QQcmdZViewItem
There are others he has, you just have to look at them and decide.
The purpose for my connection on the contactor (A2) is I am using 120V to operate the the contacts instead of 240V. The Contactor above works either way. I'm getting a Mercury switch contactor to see how it would work. This type will never wear out IF it works. That remains to be seen.
Hope this helps.