AT 40 was distributed to stations on vinyl as early as 1976. I know because there is/was a record store in Tacoma that had a couple of sets for sale, and I've bought a couple from that year, but you can always check Ebay. If they were distributed to hundreds of stations on vinyl, there should be plenty of copies out there somewhere for replay on the new show.
Judging from the cue sheets, each hour had to time out independently of the other hours, so they had to edit some songs each week to have time to play full versions of other songs. And because they were trying to fit almost 25 minutes of content per side, they didn't have much time to play around with for each half hour either.