Access to these commercial legal research services is limited. See the Gallagher guide on Access to Bloomberg Law, Lexis Advance & WestlawNext.
Many books on specific subjects include forms. Search the Law Library catalog by subject keyword and “forms” to locate them.
See also the Gallagher guide on Civil Procedure Research Resources: Forms, Jury Instructions, Practice Materials & Treatises. Although the guide hasn't been updated recently, the sources it lists are still being published and most are regularly updated.