…well, i mean, a quick Google search turns up the 2012 Autostraddle article “20 Lesbian Slang Terms You’ve Never Heard Before” which includes among its terms:
BAMBI-SEXUALITY: Physical interaction centered more about touching, kissing, and caressing than around genital sexuality. Not to be confused with bestiality, a very different concept.
the author of the article cites the term as being from “the 1989 Alyson Almanac‘s “Dictionary of Slang and Historical Terms””, even linking directly to the almanac on Amazon.com.
a quick Google search for Alyson Almanac turns up a complete PDF scan of the January-March 1994 edition of the Alyson Women’s Book Catalog which, besides being an interesting read in and of itself (cw: for explicit sexual content), includes an advertisement for the Alyson Almanac on page 10.
moreover, on the following page is the very “Dictionary of Slang and Historical Terms” cited in the Autostraddle article.
[ purple highlights added for emphasis, blurring added for explicit content. ]
noteworthy is that bambi-sexuality is listed with the same definition, word-for-word, as given in the Autostraddle article.
meaning that regardless of how prevalent the term was or was not the past, there is precedent for bambi-sexuality (or, in other words, “bambi lesbians”) being a thing at least as far back as 1994– if not further back into the late 80′s, as the Autostraddle writer and OP have stated.
also, you know, this post by @queerasfact.
long live bambi lesbians, be they ace-identified or not.