Went to a second dealership, in fact the place where I purchased the truck from, and got the gasket for $6.58. Trans went back in with some challenges. As blhde recommended, drop the cross member when you drop the transmission. Because of the SL, and the fact that I would have to drop the t-bars and the mounts, and realign the vehicle, I decided not too. Because of the bodylift, I was able to get the trans out, without the torque converter, through the back. It took some manuvering, but it only took me an extra 10 mins or so to do this and wasn't that much of a pain to put back in. I wouldn't recommend doing this unless you can handle the weight of the trans, which I can/did. What also helped in this case was using two ratchet straps as slings to support the trans, when it was put back in. Both were tied up around the frame rails and cradled the trans, which allowed me to align it by pressing it and by using a transjack. The pain in the *** was aligning the torque converter studs with the gaps in the flywheel. That probably was the most challenging. That took 20 mins or so to do. Hopefully, she's up an running by the end or today. Thanks bldhe for the input.