User Invitation Only Registration for Magento or OsCommerce with tokens

We are in need of a script created to allow "User Invitation Only Registration with tokens" for preferably our entire website, meaning, a page like [login to view URL] or a system like [login to view URL] where you login once invited to get into whatever is inside the site (a shopping cart in this case) if this is something you cannot do please make bid to create an add-on/module for whichever cart we decide to use. OsCommerce or Magento. This would mean besides us being able to add anyone we want from the admin panel, users can only sign-up to be a member of the site if invited by another user, using the invite link provided unique to that member. Users must only be able to have a custom set amount of tokens available to invite other users unless (from admin panel) we give them more. Non-users need to be able to apply to be on the site and be sent an email and given a link to follow if they have been accepted with the username and password they have picked. The application needs to either go into the database with their username, get emailed to me, or preferably both. If you can think of other options please write in the clarification board and I will respond. Thanks! and Happy Bidding!