[CentOS] OT: UPS battery vendor

Hi, folks.

I need some new replacement batteries for rack-mount APC UPSes. My old
vender... well, the salesman I dealt with for several years left about a
year and a half ago, and last year's purchase was a disaster (wrong
batteries, wrong batteries, months to get the shipping to return the wrong
batteries...), so I'm looking for a new, reliable vendor who does US
government contract sales.

Recommendations? Warnings?

        mark