I haven't seen the police in Ferguson use anything I can't purchase as a citizen. Just need the $$$$. I would rather get tear gas launched at me instead of beat in the face with a nightstick like the old days.

APC.
http://www.intlrepo-depo.com/vehicles_for_sale_2.htm

Tear Gas.
http://www.keepshooting.com/clear-out-6oz-tear-gas-grenade.html

Rubber ammo.
http://www.ammunitiontogo.com/index.php/cName/less-lethal-ammo-12-gauge-ammo

Class 3 Body Armor:
http://www.bulletsafe.com/bullet-proof-vest.html

12ga flares:
http://www.firequest.com/G12-014.html

Ballistic Shields:
http://www.galls.com/protech-intruder-g2-20x34-iiia-ballistic-shield