Where does this anti-chafe SPRING attach for Left Rear P-brake cable?

[fixizin]

One end done rusted off, it did... does it just go in a hole in the ladder frame?

Here's how I found it, just flopping against the leaf spring... you can see it has chafed away most of the chafe-protection.

Here I've just wedged it against the frame... looking for a likely attach point.

ALSO, where to BUY one? Doesn't seem like a good U-pick candidate, here in salty humid So-Florida...

Thanks in advance!