I can recommend the following sites for some interesting "damsels in distress" Comic Book, Detective Magazine, Paperback Book, or Men's Adventure Magazine covers.
Comic/Cartoon Captives Correspondence Group on Yahoo http://groups.yahoo.com/group/c3c. You don't have to join the group to read it, and you can use this link to go directly to the most recent postings: http://groups.yahoo.com/group/c3c/messages/. Members are instructed to keep content within the confines of a PG-13 rating, and the occasional inappropriate post is removed by the moderator.
Jungle Girls Group on Yahoo http://groups.yahoo.com/group/jungle_girls. Home of Jungle girls from comics, television and the pulp magazines of the 1930's to the 1950's. From Sheena and Rulah to Betty Page and Irish McCalla. No nudity.
Sleepycomics Sleepycomics.com covers a wide range of comics, cartoons and manga featuring unconscious damsels. There are over 22,000 scans on the site. They asked nicely for a link, so I am giving one.
Heritage Auction Galleries http://comics.ha.com. You have to register to look at their permanent auction archives, but they are well worth it. Their archives have high resolution (usually 300 dpi) cover scans of almost 400,000 items, focusing on comic books, pulps, and movie posters.
RTS Unlimited, Inc. http://www.rtsunlimited.com/. Lots of gold and silver age comics for sale, and sets of the famous Gerber Photo-Journals for sale at a discount. There are also several galleries of cover scans, with lots of bondage covers in the mix.
http://www.buysuperherocostumes.com I don't have personal experience with these folks, but they seem to be of fannish inclination. I see four different styles of Batgirl costumes, five different Wonder Woman, and three different Catwoman. They asked nicely for a link, so I am giving one.
http://www.gayrealestate.com/real-estate-resources/where-gay-and-lesbian-comic-book-characters-live.html This page includes an exhaustive listing of gay and lesbian comic book characters. While not particularly on topic for BCOTD, I have been promised that a bunch of kids in a youth center reading program will have a pizza day if I post this link. Beth and Susan, I hope your pizza is hot and tasty!
A friend of mine has a project to identify all of the photos included in the book Sadism in the Movies by George de Coulteray, published by the Medical Press in 1965. He's made a lot of progress over the years, but there are still some that elude him. Check out his progress at http://bcotd.com/Sadism_in_the_Movies_stills_identification_project/ and see if you can contribute anything. Make sure to read the notes.txt file at the top, and tell him Covers sent you!
"Venna's Planet" is a 70 page graphic novel published in September 2018. It's full of adventure and lots of damsels in distress. The author is a good friend of mine. Highly recommended! Here's a link to purchase your own copy. Venna's Planet Book One--Broken Promise by Robin Evans 2018 Acorn Books