I have apple music but I want to buy an album, how do I search the store for an album?

I can't seem to get to the iTunes Store to buy an album. I have Apple Music but I want to buy this album (so I have it even if I discontinue Apple Music for some reason, plus I want to support the artist).

I must not be signed into Apple Music on my MacBook Pro because I can get to it there, but on the iMac and iPhone (and iPad), I can load the store, but can't find how to search the store for the older album I want.

Thanks!