Looking for a cab step

[flyngti]

My wife has a tough time climbing into the cab of our '69 and I started looking around for a bolt-on step. All I've found so far are universal mounts but nothing specifically made for our trucks. Searching here hasn't helped since "truck step" brings up nothing but hundreds of posts about step sides. I'm looking for just a small step, not a full nerf bar or step bar.

If I get a universal mount, does it bolt to the cab or frame or both?

Any help?