/diy/ - Do It Yourself

So I'm trying to buy some clip-on heat sinks... and thinking way too hard. Pic related is the three available options I found on amazon.

The top one is priced ridiculous. WTF?

The second one down is more realistic (roughly $2 each) but I am a cheap bastid and don't even want to pay that much....
I'm trying to find these things on aliexpress, and I can't find NUTHIN... even the cheap little "soldering kits" that have all the stuff for basic electronics soldering,,,, do not come with anything like this. I have searched for every usefaul variation I can think up and all I find is Kelvin clips. Is there a secret code name for these things in China or what???

The bottom one is another type, but I would guess (?) that it would be made of steel,,, becuz aluminum isn't that springy. And steel doesn't transfer heat nearly as well as aluminum does... does anybody use this type? Do you notice that it works less well?

I have also found elsewhere that there are ones with some kind of copper jaws. I aont ever used such a thing, but on pro-tool sites they are pretty common... Mcmaster-carr has some like this for like $12 each. I wonder, does the solder stick to the copper tho? Or is it some special alloy used to prevent that.

I may attempt to make my own if I can't find any to buy really cheap.... that way I could make some with copper and aluminum and see if the difference is worth it. :|