I have not taken a look yet at Manage Links but will it allow you to do a search from a site like Album Art Exchange?
as long as you know how their site works, yes this is what I use for Google Images (for which I forget who to thank for)
https:////www.google.com//search?as_st=y&tbm=isch&as_q=Hexify([Album Artist (auto)] [Album])&safe=images&tbs=isz:lt,islt:2mp,iar:s,imgo:1&biw=1920&bih=984
This looks for big images then you drill down in image size until you find a cover - this pulls album artist and album from your selected tracks so you don't type anything
here's one for an ALLMusic artist search
http:////www.allmusic.com//search//artist//[artist]
for your site have to play around with a manual search and copy the URL into the search URL box adding always this "http:////" it needs the four "/"s and inserting the fields in brackets
sometimes you have to add hexify in there depending on the site (Google is a numeric as an example)
try playing around with this for your site url =
http://www.albumartexchange.com/ and this for the base URL using Manage Links as a start (can't test this now)should be something similar
http:////www.albumartexchange.com/covers.php?q=[Album]
some sites won't work if they make you download covers, but once you set this up right it is invaluable - works for IMDB Rotten Tomatoes for Video too