BuddyPress.org

For my website, I’ve created an ID field users have to enter to create an account. On a user’s profile page I want the ability for others to click the ID and go to an external site with that ID. For example, with an ID of 12345, I want the ability for someone to click the link in that user’s profile and go to example.com/12345. BuddyPress already has something similar to this but it only searches for members in the site with that ID. I want it to go to a different site with the ID. I assume this would have to be an action of some kind, but what would the hook be? Additionally, how can I access the profile field’s value? Any idea what the code would look like to send someone to a different site in a new tab? Thanks for your time.