Here are links to some commercial solar cookers. I found a sticker on the cooker I am using that identifies it as a "CooKit". I have no affiliation, etc.

Solar Cooker’s International CooKit $25
http://65.108.108.197/catalog/solarcookerskits-c-1.html?osCsid=c11beee230214e15b751ae00e5e55966

http://www.safetycentral.com/cookersheaters.html

Surfer Chef Solar Cooking System $30
http://www.surferchef.com/

Hot Pot Solar Cooker $100
http://www.gaiam.com/product/solar-livin...solar+cooker.do

Sport Solar Oven $168
http://www.solarovens.org/sossport.html

Clear Dome Solar Octagon Parabolic Solar cooker $250
http://home.att.net/~cleardomesolar/parabolic.html

Tulsi Hybrid $265
http://eartheasy.com/solar_oven.htm

Global Sun Oven Solar Cooker $300
http://www.safetycentral.com/globalsunoven.html