Unless I'm missing something this does not seem like a horribly difficult script. Let's assume that the forums are stored in a MySql database and that you are using php. If that's the case you just start the script with a query to extract the applicable headers and other info from the db, and use the result to write the body of the email. I would then assume that you have a separate table somewhere of all members who have requested this service. You simply extract the addresses of those members with another query, loop through and send the email to everyone on the list.
I know that I glossed over a lot of that, but I wasn't really certain if I even understood the question. If my assumptions were correct and you need help w/ the code please provide the applicable table / field names and I'll be glad to help w/ the code. There would be quite a few options to consider. Do you want to write the emails in html, or simple text? Are you using and opt in for the list? An opt out? Just blasting it to all members?