I'm in the same boat. I have Amazon Prime, but I really want to download a hard copy of this. Doesn't seem to be a way to for now.

Edit: Looks like you can now purchase the album on Amazon: https://www.amazon.com/Run-Rudolph-Amazon-Original/dp/B08PP6PF11/ref=sr_1_1?dchild=1&keywords=foo+fighters+run+rudolph&qid=1608125864&sr=8-1