Design me a Product

I need a simple circuit designed so that when a TEP (Peltier) module that is heated on one side and cooled on the other, resulting a variable DC current and voltage output, I wish all the resulting electrical energy to be captured by a group of small UltraCapacitors (acting as a battery) and then discharged slowly in order to illuminate a small low powered LED light. Perhaps the source can feed the super caps in parallel and discharge them in series. (probably need diodes separating them) The idea would be that the LED would glow while the TEP module is being heated, but also that the extra energy is being stored in the super caps so that when the TEP module is no longer being heated, the LED would continue to glow for as long as possible. I would like to use 2.7v Ultracapacitors of anywhere between 1 Farad and 100 Farad, ideally two or three of them in total. The resulting circuit should be able to be manufactured in quantity for less than $10.