We have two options for CiviCRM Upgrades:
ONE: Upgrade service for CiviCRM (on any CMS) and Drupal core is now available from our trusted partner CiviTeacher.com.
Please visit their CiviHosting Upgrades page for details and to purchase an upgrade from them.
TWO: For WordPress sites, we have a WordPress Management Platinum Service which includes a large set of features, including optimization and edits, and upgrades to all plugins, including CiviCRM. This service is $200 a month and has a two month minimum. But you can purchase it for two months, and then cancel.