This was probably just an ad that ran in all comics at the time, but my Epic Edition Defenders: Ashes To Ashes trade reprints an editorial from Defenders #125 (the first issue where it was The New Defenders); across the bottom of the page is a banner that reads:
"John Byrne's
Alpha Flight
'nuff said, eh? On sale now!"

I probably wouldn't have mentioned it if I had the issue, but it made it into the trade reprint.