I believe a few folks have retro fitted refrigeration. Showers are unknown to me. If the head area is anywhere near the size of my arcadia, I would go what the original owner of my boat did while cruising into Desolation, take a sun warmed up outside shower bag along. And or hit marina's every few days. Generally speaking, there are plenty of marinas in this area that have showers.
Are you looking at the boat Oak something north of Victoria? That is only local Attalia I could see for sale.
She drives me boat,
I drives me dinghy!