Is there a way to force a redirect to a login or purchase access page (not on invision community)? 

example- the links on the menu go directly to the community, forums, etc.  When clicked - if they are not logged in or a member, it would redirect them to the proper login / join page for access.

i've looked around and am not finding this option or how I can make it happen- i may have missed it though. thanks!

There is no built in option to do this. An error message is shown with a link to the login page.