[...] em_ID=53364&group_ID=2217&store=snapon-store&dir=catalog [[...]]

Is that the one? If so I believe you can buy a replacement Sealed Lead Acid Battery from [...] [[...]]

IIRC, this is the one you want,

[...] odid=12146&drilldown=265101&mfgdsc=&mfgc... Login to read more.