I used a simple cheap pump-up garden sprayer from Lowes.
Just used clear tubing instead of the wand, which attached to the pickup nub just fine, and a threaded fitting for the oil galley plug. Put in 4qt to start, pumped up the airpressure, and let it go to work. It was a bit slow, but worked very well pushing 15w40. Cost me all of $20.
Only thing I think I wouldve done different was add a valve of some type in the tubing, so I could turn it off if I wanted. Probably could've just used the wand and put the clear tubing on the end of it.
It also worked well for putting fluid into the transfer case and front diff when I had to do that.