Need Your Help - Trunk Lid Torsion Bar Alternative

I looked up Mopar part no 2765375, and there are two options. Pine or Oak. Around here were having issues with Japanese beetles decimating pine. I'm afraid the oak will be too stiff an I'll be right back where I am now.......any other part numbers available?

2765375B it is made from Bamboo but then you may have an issue with introducing foreign parts into you classic car.
I may have a set of torsion bars from a notch I parted several years ago. I will give it a look later this week.