Parking brake spreader bar spring?

[KQQL IT]

Where could I round up this oval spring. Mine was broken and cause the rear shoes to burn up.
Put it together with out the spring and about ruined a new drum and shoes.


The parts store spring kit didn't include said spring.

Pulled the spreader bar out and things seem to be operating normal again.

For a 68 ish C-20 had to source different years of c-20 to get drums and wheel cylinders.