I have a smallish igloo max cold that worked well with keeping my old cat's food frozen for 3 days in a car trip but was in the way too much last summer when I thought I had a fridge. I think another trip to Goodwill is in order for the not so cold coolers I have. The maxcold just fits in the cavity but with a fair amount of wasted space around it and it is not a large cooler. With ice, it holds a minimal amount. I'm going to put Reflectrix insulation on the bare van wall to provide some insulation there, at least for the short term and get a cap for the propane and 12V wires.
For a longer term solution, I'm leaning to a 12V high efficiency, low-juice compressor refrigerator. I found this http://www.vfamerica.com/eng/catalog.asp?catid=427&n=oceandrawer that looks intriguing. I don't know what they cost but suspect they are pricey and I don't know how good this particular unit is. Seems like a drawer might be a nice tradeoff in efficiency/convenience. Cold air couldn't spill out as much but I wouldn't need space above it to use it. It looks like a single drawer of this one would have the same inside space as the old refrigerator and things would stay put better in a drawer while under motion, assuming there's a locking mechanism for the drawers.
After all the problems with the 3 way absorption fridge including the annoying need to find level parking, maybe this sort would work better. Lots of people say it isn't hard to find level but in my trip last summer, I had problems getting the van level enough for the fridge while everything else in the van was level enough to both work and be comfortable.
I measured a 2x4 foot space on my van roof in front of the air conditioner where a solar panel could fit. If I got rid of the round TV antenna up there and put in one of the folding antennas like was original to the van, there would be another 2x4' space up there. It looks like I could get about 80-95 watt panel in a 2x4' space. I've been thinking of putting on a solar panel anyway to have a better power plant. The faint rectangle shows the potential space for a solar panel.