Is there any update on this. thread?
I have a similar need as well. I need to design a custom heatsink for a thermoelectric element (peltier cooler).
I already have the virtual foundry filaments and many other metal+pla filaments.
I did not try to print a heatsink using virtual foundry FDM filament and use it as is, w/o sintering.
But by touching it , it does not seem to have enough thermal conductivity. It might still be usable because
of better surface area.
I might go for, aluminum laser sintered prints. It might be the only option.