The defunct web site room509.net had a bunch of lengthy, full text articles (many from the ITD era), but it's long gone. Some of it was accessible on archive.org, but I can't seem to get it to work now:
http://web.archive.org/web/200806010341 ... om509.net/You could ask your question over on the unforumzed.com PJ forum (which is what the original atforumz site morphed into):
http://www.unforumzed.com/forumdisplay.php?33-PJ-HarveyThere are a lot of long time PJ aficionados there. As near as I can tell there are no archives available there these days.
Try a search here on this site for "Flannery" or "O'Conner". Perhaps some leads will come from that. This topic has come up many times before. You can also search the unforumzed site.
I'd be pretty surprised if PJ ever mentioned O'Conner in a formal interview. She's well known for being reluctant to discussing the origin of her lyrics. In the last two albums, she has gotten better about attribution (right on the album 'sleeves'), but not the older ones.