Help with my window channel

I am looking for replacements.

The aluminum part is 23 inch long.

Looks like 23" Series 370 Channel Balance Product Code: S370-23

Do you have replacement springs.

Thanks,
Ray

Thanks for your response.

I do need a few channels and would like to repair others. Can I use 3/16 or 3/8 dia. X 1/2 long aluminum rivets installed by a rivet gun for the plastic ends?

Do you have replacement springs?

Thanks for your help,
Ray