Need somebody to integrate Invision message board with drupal (including registration, etc.) - give quote

I want to buy the Invision board but have it work with Drupal. I feel it's the best board out there and I'd like to use it but want to run the rest of the site via Drupal so I need somebody who can tie the two together.

I think I spotted a module for this, but don't know the first thing about the setup. I want the users to be able to use their drupal login/pass for the site to post on the invision board (possibly even vice versa if possible).

I want a quote on what it'd cost me to integrate the two. shawn@lesky.org