Dive Rite Old Dive Rite Canister Light Battery?

Old Dive Rite Canister light battery? - dive rite

I have two lights turn right scuba diving, a few years ago. (There is nothing in the light of written as a model and what it is, is ... etc) has no LED.

I need a replacement battery. The dough was generated from a model PS-1229 Power Sonic 12 Volt 2.9 Amp hr hitter ... Where can I find?