Boy do I ever miss myostrich and the info contained in Tim's forums. Can't even recall if the shaft profiling was here or somewhere else.
https://www.golfshaftreviews.info/technical-stuff/bend-profile-signature/
There is this website, above, but it is far from comprehensive and charges an annual fee for the information.
If the shafts are too light, how much weight will you need? Guessing a few grams of lead tape under grip is not going to do it, Time to post a WTB Shafts for $12 shipped. Otherwise, if you want slightly heaver and softer taper tip, Dynalite XP gold may be your huckleberry. Parallel Tip will probably get you some FST125 S/X Flex suggestions.
Good Luck with the hunt...