Source for GPU replacement parts?

[VanGoghComplex]

Specifically, I'm looking for the heatsink found on the MSI GTX 1050ti LP (or similar; looks like their LP card lineup has used the same cooler before).

I've got a Gigabyte 750ti that I want to passively cool, and MSI's stock heatsink is nice and meaty, AND anodized black.

Anyone ever found a source for things like this?