Need Sabon font, not available in Acrobat DC, help?

The original Type 1 Sabon font family is no longer supported by Adobe apps. There are a few replacements you can use. Adobe Fonts offers Sabon LT Pro in Regular, Bold, Italic, and Bold Italic weights. If you are also using Adobe apps, this font should be freely available under your leasing plan.You can also buy it at Adobe or MyFonts. This is the version most like the original Sabon. 

Sabon LT Standard has four weights freely available on several sites, and lays out a little wider than Sabon Lt Pro. Its letterforms look much the same. You can adjust for type reflow by kerning or tracking the letters more tightly, although this is clunkier in MS Word than in apps like InDesign and Illustrator.

I am working on a series of music books with song titles that were originally in Sabon Lt Pro. Two days ago, Adobe Illustrator stopped recognizing the font (its own font!?) without any warning. For some reason, Illustrator didn't offer to link to Adobe Fonts. So I replaced the titles with Sabon Lt Standard.

A third option, which spaces out even wider than Sabon LT Std, is SabonNext, available from MyFonts and other sites. The letterforms look like a slightly heavier version of all four weights of Sabon LT Pro. This can be handy if you want to use a bolder Regular or Bold, for example. But too bold doesn't really work with the Renaissance feel.

Sabon was derived from Garamond, another Renaissance serif font. Adobe's original Garamond spaced out too widely for easy use in books and newsletters. Adobe came up with a more forgiving version, Adobe Garamond, which it still offers. There are also free new Garamond versions, for instance EB Garamond, available from Google Fonts.

You're right about Minion. Minion has a higher x-height (height of lower-case letters) than either Sabon or Garamond, and a more modern feel. I guess the proper description would be "Transitional" instead of "Classic."

You can purchase any font and install it on your computer, but that doesn't mean it will succeed in editing. You won't know until you try. HOWEVER, what you are doing should not be done - a typeset work should not be edited as a PDF, the ORIGINAL should be edited. It wasn't made in PDF, it was converted to PDF as the last step.

If the company has asked for corrections, absolutely do not try to edit the text: this would be a disaster for you as you would have to redo it properly. They want you to mark up the corrections, to tell them what to do.