I haven’t a clue, but I bet if you were to call one of the industry leaders, such as Evergreen Solar, SunPower or Energy Conversion Devices, they would be able and willing to help. Just explain what you’re doing. I’m sure they’ll appreciate your interest. If you want to try a ballsy move, look up the name of the chief financial officer of each company, then call the switchboards and ask for them. You almost certainly won’t get to speak to them, but you’ll probably get someone else who can help.