i tried reverse searching on iqdb and i think sankaku might have had a different file on this url https://chan.sankakucomplex.com/post/show/2583752 (idk tho) but they stopped using urls with just numbers and changed to number with letters so the url doesn't work anymore. iqdb says it was tagged with "nun" so i also searched all bridget posts on sankaku tagged with "nun" but i couldn't find it either so idk if that file is better or worse

btw i found a desktop screenshot on deviantart from jan 2004 that had the pink version so it's probably from the start of 2004 or earlier https://www.deviantart.com/lenore-kinns/art/Desktop-4957878