We carry this round exclusively Quals and all practice
Yes you can buy it at Tactical Defense Solutions and you do not need to be LEO to purchase.
Tactical Defense Solutions LLC - Specializing in high quality supplies for the critical shooter
Just click on the ammo tab at the left. Right now he does not have any Federal 9mm HST but he always gets new stuff in so if you keep checking you will find what you want.
Federal HST Ammo is really good stuff. Here is a ballistic picture showing the HST and others.
Full test here for 9mm
Pistol Cartridges (9x19mm Luger)
Semper Fi