Head Model and rep tank for 2003 Troll

[MiltonP]

My Troll had a head swap. I don't like the raw water Jabsco Lite and think getting back to a Vacuflush might be the smart move. Does anyone know the original model? It looks like one of the 5000 series in the pics.

Also wondering if anyone has replaced their holding tank. Guessing a custom stainless steel may be required to fit that space unless I am luckier today than yesterday!.