The Custom Catalog only lists weights for the TS products. Your local Titleist dealer can contact Titleist to see if there are any 917 weights still in stock. Some outlets that build custom shafts that also are on e-bay may be the best source if Titleist doesn't have any 917 weights for sale. An example may be Dallas Golf. There are some after market dealers that may offer replacements.

actually, there are after-market weights for the older Titleist products on Amazon. I had a hard time find some for my older D2 Driver and had to resort to using Amazon to get some after market ones. The original Titleist ones are impossible to find for some reason.

Thoughts on T100S? Height of shots? Trajectory?