Parts for those coolers are not available. There's always someone trying to sell an Intel CPU cooler on Craigslist which you could cannibalize, but they all charge more than the $5 a used one is worth. My suggestion would be to buy a new one. If you love Intel coolers, you can buy a new one from Intel, Amazon, Newegg, Micro Center, or the usual vendors. I would suggest going to a non-Intel solution. I like Dynatron's P985, but then again you seem to want something for only a few bucks. The P985 requires access to the rear of the motherboard. Dynatron P985 CPU Cooler - Newegg.com
I'm looking for just the fastener and not the whole fan/heatsink assembly.
I would like to buy it from a US company.
I called Intel and they said they only sell the whole assembly if one of the fasteners gets broken.
What a rip-off
I guess I'll try my luck with ebay and this person in China. I hope it works and I get the fasteners and they are undamaged.
I understood exactly what you meant.
Someone in China might sell you the part you are seeking or they might sell you something that's just a little out of spec, enough that the heatsink does not seat properly on the CPU. Do you have a micrometer to verify that all of the dimensions are correct? As soon as you reboot the fixed system, verify that temperatures are not rising.