Converting 2024 eSprinter Camper Build

We are building an eSprinter camper. My question is that I am trying to decide about an AC unit. I have room in the front near the sliding door roof but the unit cannot exceed 6 inches on the roof to fit in my garage. My system is 48 volt FYI.

I've looked at the under bench models (Pioneer and Velit specifically) but I am concerned about the non-standard holes in the floor in the event I have to replace it. Any thoughts?

I've found some Chinese 12 volt units that are supposed to be under 6 inches (150mm) but I can't ever get a straight answer from the companies. I found 1 Chinese 48 volt model that is supposedly 5.8 inches above the roof but I cannot get confirmation other than the eBay ad. I would like to keep it under $2000