Waktasz, someone earlier mentioned buying an XD when the OP stated that he can only have DAO guns. I would concur that the XD is a fine pistol except that it doesn't fit the requirements.
Folks, in the world of Law Enforcement, jobs became extremely scarce so saying "find another job" if being a Police Officer is what he wants, is extremely difficult to do. Some cities have absolutely ridiculous requirements. My local PD requires you to purchase a Full Sized Glock in .40S&W or .45ACP with night sights and you have to buy a TLR-1. They provide NOTHING for it except ammo during the academy. They will give you a stipend for Uniform Stuff AFTER you purchase your uniform, belt, holster, cuffs, etc. It's all part of the budget issues various cities are going through so I'm not surprised.
I'm more surprised to hear the ammo cap limit and the limitation to 9mm than I am about having to purchase his own. Maybe it's because every PD here locally is switching to heavier .40S&W and .45 ACP due to the ever increasing drug problems among violent offenders.