big pete-
Welcome to iRV2!
These boards don't fail very often. Why do you need to replace yours?
Your best bet for a replacement board is Visone. There are several listed if you enter "Monaco Battery Control" in the search box at
this link; they may have one with your part number still in a chassis in the junkyard. I'd call them.
Note: Monaco owned several brands and often sold similar coaches with different "badges" (think Chevrolet, Buick, etc.). The 1999 Holiday Rambler Vacationer
may be the twin for your LaPalma. And, parts for other model-year coaches may work as substitutes. Keep these points in mind as you look for parts.
You should add a "signature" to your profile. It contains whatever info you want; most people put info about their coach there, so they don't have to type it into each message. Instructions for adding a signature are
here.