Botach Tactical (www.botach.com) is a good source for tactical
and related gear, and if you get on their list they will e-mail you with weekly specials at great discounts.
I'm rather fortunate in having three budgets to work from on my department: a firearms budget, a tactical team budget, and a
general training supplies budget. I can usually aquire what I or another officer needs by accessing one of the three.
If you check out the links section of my website, you will find all the gear guys I've had good luck with. These include Lagger Professional Services, Sabelco, and Century Arms for ammo. The URL is http://thecurmudgeon.freeservers.com
I buy from many sources. If they don't have the gear I want (or the best price), I'll shop around. My favorites include Galls, and also Botach. Locally (Seattle) is a police supply store/chain, Blumenthal's.
We get about $600 USD annually to spend on "approved" items.