Ok, the one that Rich put the link for is the one I was looking for, first off, a bit more info about your X ? year, miles, model.... SC or NA....
Look at the link that Rich posted, if you go down to about the 12th photo, the caption above it starts by saying "New Seal..."
if you look at the right side of that pix, about the middle, you see a short black water hose, "L" shaped, it costs around 10 or 12 bucks , change that while you are in there, before it fails and causes you to have to tear into it all again.... also, I've seen some pix of the lower part that it connects to being rotted out pretty bad. Mine was not showing any signs of rotting out, but better to see it firsthand and be safe rather than sorry later...
also, if you order the kit from xterraparts, which is what I did, made it so quick and easy to get most everything needed, as well as being able to buy that small hose from them as well. also it doesnt come with a gasket for the thermostat, you can get one from most parts store, or just use gasket maker, or whatever you prefer for that.