Im looking for a 5v DC fan that has atlest an operating temperature range of -40 C - 80 C, and it needs to be a 40mm fan with 20mm depth, but haven't had any luck finding anything yet. I've found fans that operate in that range, but they are typically 24V or 48V DC and I am unable to generate that high of voltage in this application. I was wondering if anyone knew if a fan like this exsisted and where it could be found?