SunFrost is apparently a well sought after unit. The problem is, it has a minimum delivery time after ordering of currently about a year and has a high cost of approximately $2,695 for 19 Cu ft and $2,575 for 16 Cu ft refrigerator-freezer depending on where you get it from. You do have the advantage of being able to order it to work off 12 Volts or 24 volts DC. Don't know how well it will stand up under the strong jolts (especially upward thrusts) with the compressor in the top.
Offered by Mike.
In the back of Home Power magazine there is a classified ad section. Almost always there are a few ads selling SunFrost refrigerators.
Offered by Steve.