Thanks Paul. I fussed with it a while, the spring is definitely warped (wider in some places than other.) What ended up working for me (at least temporarily!) was I put a bit of steel wool in the hole and then put the spring over it, so it’s essentially longer but it also seems to stay straighter.

It is a light gauge wire, but it sounds as if yours is a bit too long. You could clip a small amount off one end. If you cut too much you could stretch it out with two pairs of pliers.

A spring with similar amount of tension will work even if it’s slightly larger in diameter. Then you’ll need to crimp one end to fit into the hole on the cam.

Barring this, You should be able to find a comparable spring at a hardware store or even a big box.