Since no one has picked this up, I will tell you the obvious. We have not found an easily available component. most are too strong. some are resorting to custom winding.
Rob S had some stainless ones he was using that worked fairly well. I have a few. You just have to cut them down. Don’t know if he is on here.
The old swampy Springs are Century Spring co inc. 213 749 1466. Part number CC14 Not sure if they're still in business