Before I found the pieces for a DIY installation, I'd talked to a local ambulance dealer about having one installed. They regularly replaced existing units that were 2-3 years old as a "just in case" preventive maintenance job on ambulances -- they estimated about $2000-2500 for the used AC with installation. Because my unit uses a narrow evaporator, I decided to use a totally separate evaporator instead of their combined unit. Instead of installing a dual coil condenser, I found a used top mount condenser. I found a new compressor on ebay for $100. The compressor, mounting bracket, condenser, and evaporator cost about $500 delivered to MN. I still needed hoses and miscellaneous, but the end result was a new unit for less than half the cost of a used unit.
