Broken battery contact HP-67

[swperk]

I just received an HP-67 in very good overall condition except that the prior owner had left the battery pack in the calculator and the negative leaf spring contact was severely corroded. It was in such bad shape that it snapped off flush with the calculator case as I was trying to gently clean off the worst of the corrosion.

Has anyone come up with a suitable repair, replacement, or redesign of the battery contacts in these calculators?

Thanks,
Stan