(Thanks to IsraellyCool). Israel’s Ricor Cryogenic & Vacuum Systems manufactures the K508 Integral Stirling 1/2W Micro Cooler. This neat little device is currently optimising the temperature of NASA’s vital CheMin chemical analyser on the Red Planet.
http://www.israellycool.com/2012/08/19/bds-fail-of-the-sol/
http://www.youtube.com/watch?v=ZavPVHqy84Y