Probably cheaper to set up and print a proof from KDP per blog. Would have to do the math on this, mainly the basic formatting is the labor (or automating it with AI now, not too bad). Proofs do not require a review per-say, but likely falls outside the user agreement since you dont own the content.
Access to kdp and time to do this varies.
And if you do a good enough job, contact the blog's author. Maybe they would see the intrinsic value, but mainly question how weird it is to receive such an offer.