Radio Selection

I am designing for a e-commerce website that sells eTextbooks.

I am trying to figure out if we need to have a default select state for products that have only one option available versus multiple options. Where I am struggling is that stakeholders wants the one option to look selected as well. It would almost seem counter intuitive to me that one option looks like a radio toggle, as radio toggles visual denote another selectable option. I have scoured the internet and found only examples that reiterate one option as having no selectable state versus multiple options as either a dropdown or multi-select/radio.

See attached images below.

How I envision this:

How stake holders envision the single option:

The question is... what is the best practice? Should PDPs with one option show a selected state, or should it look more not selectable?