I switched from Hydra-Shok to HST several years ago as I think it is better.
And you can get 9mm 124gr. HST @ 1200 FPS, 396 ft lbs. Part number P9HST3. Anyone will sell it, if you can find it in stock. AmmunitionToGo, SGAmmo, TDS-US, Ammunitiondepot, whoever. Have you considered shooting standard pressure loads?
Or heavier loads?
Winchester Ranger T-Series stuff (RA9TA, etc.) is also good.
I don't shoot 9mm so I'm not up on all the different 9mm loads, but I will probably be getting my wife an M&P 9mm so I will buy her HST when I do.