Is there an invite over mod for xenforo?

Does anyone know of an invite system for xenforo?

 

Any help?

https://www.google.com.au/?gws_rd=cr&ei=rylaUqbDBIemkQWnloCQCA#q=+invite+system+for+xenforo

 

I was looking at this myself: http://xenforo.com/community/resources/xencentral-invite-system.2337/ Doesn't look too bad for ~$28.

I bought XenCentral's Ad Server and haven't installed it yet but the transaction went smoothly. In the time since I've bought it XC released 2 or 3 updates.

 

http://admin-talk.com/threads/5-xenforo-addons-by-ragtek.42869/ i think mine should still work