[nicoff]

I had a similar issue many years ago. I bought a cheap angle bracket at a hardware store and while it is not as pretty (or as expensive) as the one suggested by Ivan, it worked. I had to be careful when walking around the room. Ivan's suggestion about anchoring to the studs is right on to avoid vibrations. If you go the angle bracket route, you can always add other supports/isolation under the TT if needed.
I believe that a TT (more than any other equipment) is most sensitive to vibrations.