Gotcha. I drove you-know-who's and it was as tight as a drum. It was awesome and that made me go this route. My total tab was $285 and the breakdown is the following:
1 - Item #15xxxx (that's what it says) - Vibration U-Joint, Stainless, Special 736x536 ($133.63)
1 - Item #113412 - 3/4"-36 x 9/16" 36 Stainless U-Joint ($92.60)
1 - Item #419273 - 3/4" - 36 Splined Shaft, stainless, 11 3/4" long ($43.96)
Apparently the vibration reducing U-joint is a little longer than stock so that changes the length of the shaft itself. That might factor into your friend's situation.