Here's a list of the 44 I have come across currently.
These sites are also tributes to T, but not "vs" pages.

Aircraft Carriers Mr.T's thoughts.
Mr.T Alive!
Ask Mr.T!
Be Somebody or Be Somebody's Fool Tribute
T-Bill Mr.T as currency!
Bring Back T! A campaign to return Mr.T to the TV
Clubber Lang An essay about Rocky's greatest opponent
The T Dance Seen hampsterdance.com?
Mr.T's Domain
Mr.T Fool Tosser Toss your own fools!
Mr.T's Jibba-Jabba Movie
Mr.T Mailing List
Mr.T and Mahir Cagri Parody of a popular site
Mr.T Message Board
Another Mr.T Message Board
The Mighty Fist of T
The Mighty Forum of T
Mr.T Poems Haiku dedicated to T
Mr.T as President in 2000!
Pro-T Movement Dedicated to spreading the power of T
Mr.T Purity Test
Mr.T Resource Archive
Mr.T vs X Dedication Page Interviews with T vs X creators, etc.
Mr.T vs X Page Builder's Guide
The T Shrine
The T'inator Translates pages into "T"
Toughest Man in the World
Mr.T's Weather Page
Mr.Tzilla Odd...