Some folks suggested copper pennies (old ones minted 1981 ... The quad-penny and the Aavid heat sink fared above all the other configurations, and almost at par with each other.
Except, what could that gold-plated copper ... sink fits the bill. In the case of this project, [Dean] created a custom PCB that accommodates the PowerPeg connector, onto which the heat sink ...
ToffeeX, Imperial College London, and University of Wolverhampton advance thermal management with copper 3D printing and multiscale modeling.