Headgaskit kit for '97 Deville

I recently was given a '97 Deville and after much consternation have concluded that I need to redo the head gaskets. Does anybody have the repair kit for this?
I found it online through AirCooled.net, but I'm leary of posting a $500 deposit online. I'm in the Nashville area. The kit is Cadillac Northstar 4.0/4.6L V8 Head Bolts, 11 x 1.5mm, J-42385-500.