Replacing SATA power connectors

[ArrowMk84]

I recently sold my old PSU, and unfortunately it arrived to the buyer with two damaged/cracked SATA power connectors (apparently the package was roughly handled, because the PSU itself was lose in its shipping box). Anyway, I've offered to help repair the connectors. So, aside from a couple of new connectors, what tools will be needed? How, step-by-step, do you replace the connectors? And where's the best place to get the parts and tools from?