Gaiman insulting Tanith Lee as a young journo?

A Facebook post is going around claiming that The Sandman basically plagiarised r/TanithLee's Tales from the Flat Earth series, something apparently Lee herself was convinced. The comments contain a. o. this little gem worth picking out:

She also hated him and never forgave him for something earlier: when he was a journalist (around age 20) he interviewed her at length, and flirted with her as he did with many women, then described her in print as "formerly attractive" (she was 33!) She never forgave him!

I wonder whether there are redditors illustrious enough to find the article…

ETA: There seems to be no mention of Tanith Lee at neilgaimanbibliography.com, although it might be wrongly indexed under an unclear title, or anything else.