Ok I found a power supply from eBay using best offer. It's most often used for medial equipment.
The seller described as “Was never used but have some signs on metal " It's internals appear similar to the PD9280 except it doesn't have the battery charger portion of the psu and the huge heat sink. Cost from best offer is significantly less than a 30-35 watt RV converter charger.
I'll see how well it works out to supply 12 vdc without batteries. If it doesn't, I'll install a battery with a converter/charger. I may add some fuses to both the DC out and AC in.
DigiKey XP Power JPS250PS12Newark XP Power JPS250PS12https://i.ebayimg.com/images/g/68EAAOSwECZUmsr2/s-l1600.jpghttps://i.ebayimg.com/images/g/cgEAAOSwyZ5Umsr~/s-l1600.jpghttps://i.ebayimg.com/images/g/qesAAOSwMpZUmssJ/s-l1600.jpghttps://i.ebayimg.com/images/g/o1cAAOSw7ThUmsr6/s-l1600.jpg
