Just went through the same thing on our 2002 Lance 811, see
this thread. Rebuilding the camper due to water damage and replacing the fridge also. The original was a Dometic 2554 5.0 cu ft 3-way fridge, and we are replacing it with a Dometic 2551, same exact fridge except it's a 2-way. We always ran the fridge on propane in the trailer, we figured we don't need to go 12v now, especially since we have 2 -20-lb gas tanks and only 1 battery.
Our camper has the same entrance door measurements as you. Unlike some other larger campers, there is no door or window large enough for the fridge to pass through.
The fridge about 24" wide and 25" deep so neither way would allow it to pass thru the door. We disassembled the old fridge by removing the cooling unit and that allowed it to pass thru the door. As a byproduct of the water damage repairs, I have removed the dinette slide out, so that's the way the new fridge is going in! Note to self, remember to install fridge before putting slide back in!
I also had the door out for an unrelated reason, water damage to the floor. It's not hard to remove and replace, just get a roll of butyl tape.
FYI, I got our fridge brand new with full 2-year factory warranty at a scratch and dent RV appliance place in Shipshewanna IN for $550. Had to drive out to get it, but hey, what else is there to do?