There are two types.
One with metal clips and one with nylon bushings
If your arms have a hole with a little notch on one side, the it's the nylon bushing type.
I got new nylon ones for mine at Autozone in the help wall section.
The metal ones are harder to find from what I have seen.
Determin which ones yours uses and ask around here for them.
I'd bet someone has em, or knows where to get them.