http://www.vbulletin.org/forum/showthread.php?t=233309
Going to assume that you already have a vB.org account.
Qual Reviewed by Qual on . Search Mod for Existing Topic?! Hello, I search for a Mod that can Display Existing Topic if someone Create a new one. Example 1.I will start new Topic 2.Type Topic Titel and then see the user if this Topic Exist?! Rating: 5