The SPD9442 is made by Solid State Devices, Incorporated (SSDI) of La Mirada, California. I do not know their sales outlets, but you can contact them through their web site (http://www.ssdi-power.com) and ask about this. I do not know of an alternative device.
-take a look at Norwegian develope radiatonmeter: Vanary, cost in Jan.2012 is approx 200 € or 290 $. It looks like a mobilephone and fits into your palm. Different measurementsfunctions.
