I had a lot of work done at Deltaville Boatyard between 2010 and 2016, including the isolated bonding system for the new Yanmar I had installed in Puerto Rico in 2015. That electrician has moved on (not sure where), but the yard has always gotten the job done right, although at a price. You might call Keith Ruse ( keith@...; (804) 776-9812 and ask if they have a new electrician who knows Amels. He loves working on Amels, and tried for a while to be a US certified Amel facility...they never even replied, even after I wrote them to recommend him.
If you contact him, tell him I said hi.
Kent & Iris