67 dart convertible trunk torsion spring length?

Hello. I'm the the same boat with a '67 Dart Convertible with trunk springs that need help. Not sure which way to go here:

1. Recondition. Is this possible? Any vendors do this?
2. Custom make? Is this done anywhere?
3. Install some coil spring helpers.
4. Install some gas strut helpers.

I'm about to give up on options 1 and 2. Already gave up on buying from a yard. One thing I did that may help others was to create my own fourth notch. I know, kind of sketchy but I've run this for maybe 10 years and didn't have any problem other than it finally losing teh tension in that position. Definitely won't be stressing it any further.

Thanks in advance for any help.