Are you looking for a copy to purchase? Or just the scanned contents to read?
I was an original subscriber and still have my complete set, including some of the follow-on Calumet replacements. The first issue was in August of 1973. The final issue (announcing Fred's resignation) was #83 in September, 1995. It begins with a quote from Salvador Dali. I still read them beginning to end every couple of years. I like his curmudgeonly outlook on photography.
I'm not willing to sell my originals. But I would be willing to scan a few missing issues for you to read, just to fill in any holes. I've done this for others.
PM me (click on my name to the left and choose Private Message), if interested.
Oh, and welcome to APUG.
[Edit: Looks like Ann is also willing to help...]