I've got this Asetek 645LT small form factor liquid CPU cooler, with an Intel 115x / 13xx retention kit, that I purchased for a PC build, but I didn't end up using it. It's in perfectly good functional condition; other than the copper heatsink plate having a few markings from where it was applied to the CPU, it's basically like new.

Here's the product info page:

https://www.asetek.com/liquid-cooling/gaming-enthusiasts/cpu-cooling/small-form-factor-cpu-cooler/

Will include some various mounting hardware and some leftover thermal paste (should be enough there to get the job done for applying the cooler to a CPU).

If you think you can use this -- just pay for shipping within the continental U.S., and it's all yours!