I would need a page to invite migrated user base to access the site

Hi

So I got the people migrated from the old database! What I would like to do now, is to use the "Forgot password" - feature and customize a page where I would ask the existing association members to submit their e-mail address and they would receive e-mail with user account and password reset link.

The current stylised membership forgot password would work great. How ever i cannnot directly link to that page. Is there an easy way to extend this feature in a way as a shortcode or something that i could have a page with instructions to existing users that could fetch their new login information to the site?

I know this might not be thought as such on the functionality but I was hoping that you would be able to point me to the right/smart direction before I start doing this from the start.