Show block only to users with ubercart role expirations (< 6 weeks remaining) or with no assigned role (expired).

I'm trying to include a block in the content of the /user profile page. So far I found the documentation here (http://drupal.org/node/134433) showing how to limit the block to only users on their own profile page, but I'd like to add the filter arguments for:

&& (or (user has ubercart role expirations with 6 weeks or less)(user has no additional roles))

global $user;
if (arg(0) == 'user' && $user->uid == arg(1) && arg(2) == '' ){
  return TRUE;
}
else {
  return FALSE;
}

...posted in the block > visibility settings > pages > php option.

I'm a newbie to posting issues, working in php and some of the backend stuff for drupal so I apologize for any standards or posting errors, etc. If there are any questions about this request just let me know and I'll reply ASAP.