This may be a long shot.
I am looking for a heat sink off a video card. I want to try to convert the video card in my HTPC into a passively cool card. The goal is to attempt to attach a larger heatsink than the one currently on the card. The card is a Nvidia GT610. Looking for any heat sink you may not need but nothing MASSIVE because its a short low profile card
This one should be considered a long-shot/last resort and/or experiment but i have an nvs 300 with artifacts that i can rip the heatsink off of. It's not a larger sink however it is passive and it may be passable for you if you have good air flow.
If you're interested let me know and ill check it out tonight.