I am looking for the following accessories to allow connecting
external power to my Yaesu Ft 51r Ham radio.

EDC-12 Allows connecting to a cigarette plug in a car or power supply.

FBA-14 Allows operating the radio on four AA batteries.

I would also like to buy a dead battery for the same radio to tear
apart and build my own adapter.

Depending on what you have I might also be interested in other
accessories for my radio.

Thank you.