I figure the "one of the most important jazz albums" clue is one of this bunch from 59-60:
Jazz in Silhouette (makes sense considering Craft is putting out The Futuristic Sounds of Sun Ra from 1962 in September, AAA/RTI)
The Shape of Jazz to Come (could they do a mono mix since Speakers Corner/Kevin Gray just put out a stereo version?)
The Incredible Jazz Guitar of Wes Montgomery (there hasn't been a good reissue of this in decades, I think the master tapes toast, and the 80s OJC sounds really awful)
Mingus Ah Um (Sony isn't giving out this master tape, so no AAA, and they said Classics are gonna be AAA from now on)
and the previous exclusive artists probably refers to Mingus, Monk, or Lateef, which could point to one of these albums:
Yusef Lateef - The Centaur And The Phoenix
Yusef Lateef - Cry! – Tender
Yusef Lateef - The Three Faces of Yusef Lateef
Charles Mingus - Blues & Roots (AP has a 45 RPM reissue coming out soon)
Mingus Ah Um (same comment about Sony and master tapes as above)
Mingus Dynasty (ORG did this recently, so I'm skeptical)
Thelonious Monk - The Thelonious Monk Orchestra at Town Hall
Thelonious Monk - 5 By Monk By 5
Thelonious Monk - Thelonious Alone In San Francisco
Thelonious Monk - Thelonious Monk at the Blackhawk
My money is on either Yusef Lateef or Thelonious Monk for the past mulitple VMP store exclusive artist, and then either a mono The Shape of Jazz to Come or Sun Ra for "important jazz album"