Maintenance & Workshop TalkThe central area for general maintenance, trouble-shooting and modifications ------------
(Other technical forums on the site are model specific)
I'm not totally sure it's the same, but I just got a new battery for my Trident late last year. ETX15L-SEALED AGM BATTERY, from Battery Giant. It was $50 shipped.
See my review of BatteriesPlus stores , they may have a store close to you- and if you fill it yourself you know it was done right. The AGM I got for my Thunderbird was $56 out the door no waiting for mail.