Jack, you can't find CastRecL because it's not an Internet site. It's a moderated e-mail list serve, much like the old e-mail sites of years ago at the beginning of the Internet.
The overall theme of the list is musical theatre but there are sometimes off-topic messages. You have to send a note to the moderator with a verifiable e-mail address. He then approves you and you start receiving the e-mail, either as they are sent or you can choose to get one e-mail every day which contains all the e-mails posted that day.
There is a regular coterie of posters (Larry among them) and there are hundreds (or perhaps even thousands though I doubt that number) of lurkers who may post once a year, or less. I am one of those lurkers. It's sometimes very interesting but also sometimes when someone gets a bee in their bonnet it can get tedious. There are some people on the list who feel they know everything there is to know about every aspect of musical theatre. They also feel there is only one opinion, theirs, and that opinion can't possibly have anything wrong with it because it's their opinion. All other opinions need not apply. That's when it gets tedious. If you get the e-mails as they come in you learn which people can be deleted without reading their post(s).