[Christ]

If you need to make a heat sink, there are two simple options:

Use an aluminum brick (sourced from a junkyard or an old engine block) and cut slots in it, or
Get hard copper tubing and hammer it flat, then make a "comb" of it, by folding it and stacking it on itself. You can then fasten it to the solid surface and it will act like a sort of heat sink.

They're both dirty, but they get the job done, at least temporarily.