My dad is having a hard time getting into the cab does anybody make a second step for that tractor or a solution. We don't use any mid mount attachments.
Ok
Didn't know it was the compact utility 4520, rather than the larger ag tractor. Sorry.
I now see the single step. But you may still be able to add straps on each side that extend to a step. In fact, look at the step for the non-cab 4520 CUT in jdparts, and maybe just buy the parts and bolt them on. Parts #11 and #13 in attachment.
A pic of what you have now would be helpful to assist in a better design.