Accessing fuel pump on converted Alphard

So I want to replace the fuel pump and filter on my Alphard (ANH10, 2006). I understand that access is via a hatch under the floor behind the front seats. Unfortunately I've got lovely flooring in place which was done as part of the conversion to a camper. Searching around, it doesn't look like there's any good option here - I'm not sure it can be realistically done by dropping the fuel tank (I'm guessing the clearance needed would necessitate a pit as the pump is on top of the tank). I suspect I'm going to have to pull up the flooring or cut through it, which is a real pity. Anyone on here done this? Got any tips?