Wow, never thought about that there would be an aftermarket one available, looked kind of specialized. Still haven't replaced mine, stopped leaking for now!

Patriot_youth, did you end up losing a lot of coolant in the process?
I'm sure it will start again, so I'll replace sometime in the next week. I ended up getting it at the local GMC dealer, where the parts guy recognized me as a regular customer. Gave it to me for $15.04 without me even asking for a discount.

I prefer to give them the business wherever possible, and they usually return the favor...
__________________
~Dave~
'08 Chevy HHR SS, Victory Red, 5 spd. 2.0L Turbo, 52K mi.
'98 Buick Riviera, Black, 3.8L Super-Charged, 228K mi.
'98 Chevy Tahoe LT, 5.7 Vortec, Black 241K mi.
'70 Pontiac Firebird Formula 400, 4spd 200k+ mi., in process restoration

'10 Dodge Grand Caravan SE, 11K mi.