catalina27-talk: Battery Charger info needed

[Richard Shaw]

I am the Skipper of a Sea Scout Ship in Norman, OK with a donated 1979 Catalina 
27 that has an Atomic 4 gas inboard and a shoal keel. 
The battery charger has given up the ghost and so has the company that made it. 
We have a two battery system and I am looking for some suggestions of what type 
of charger I should get.
Can you help?
Rick Shaw