Here's a list of the 34 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!
Analysis of the Mr.T vs phenomenon
Ask Mr.T!
Be Somebody or Be Somebody's Fool Tribute
T-Bill Mr.T as currency!
Mr.T Blog
Bring Back T! A campaign to return Mr.T to the TV
Clubber Lang An essay about Rocky's greatest opponent
Coloring Pages
Mr.T's Domain
Mr. T E-Cards
Mr.T Fan Site
Mr.T Fool Tosser Toss your own fools!
Mr.T's Foos & Suckers Fan Club
Mr.T Goes for a Drive Mr.T don't do drugs, but this is still funny
Mr.T Hodge Podge Image Archive
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 Page Builder's Guide
The T Shrine
Mr.T Sightings Where is T now?
Mr.T in Space An amusing game
Toughest Man in the World
Mr.T's Weather Page