68 Roadrunner column gear selector arm return spring specs

[cgriffi5]

Finding our these are difficult to find new or used. Plus, apparently there are different diameters and lengths across Mopar models and years. If my latest attempt to locate one falls through, I'll see what's available at local hardware stores or manufacturers. But, I need this info to know what to look for.

Does anyone provide basic specs for a '68 Roadrunner column gear selector arm return spring?
- diameter
- length
- wire diameter

Thanks