I got the bushings from Brian Harrison at Roseland actually. Cost $3 per bushing, and $9 per bracket. Super cheap in my books. Got the ones for the 23mm front bar, because that's what my car has!
Didn't even know there was upgrated "TT" bushings ( I am guessing fron an Audi TT? )
To instal them I put the front of the car up on ramps, climbed underneath, and got comfortable, well as comfortable as possible while laying on the ground.
Tools needed were a 13mm extended socket to fit the bushing clamp bolt. I also took off the end link from the sway bar which made it easier to get the clamp off. ( sway bar could then be moved around a bit ) but I forget what size that was....oops. Also a bit of caliper grease when re-installing
That's it......yes that's it.
To get the bushing clamp offI had to wrap my arms around a few things under there....it was a bit tight, and a bit awkward, but just take your time and it is not a hard job. Take your socket in over the CV joint, don't try and come in the other way, its too tight. The tricky part comes when you have to re-instal the clamps. Like JasonDTI said above, you should get a bolt the same size but threaded to the end. My Car seemed to have that already, so the re-instal was not hard, again, just a bit tricky because you are working blind to get the bolt back into the threads.
I'm sorry if I suck at explaining things, but that's because I had never done this before, and just climbed under the car assesed what I was working with, and had at it. Took me about 40 minutes from when I got the ramps out, till I was finsihed and cleaned up. There were some pictures kicking around on the site somewhere that I found that helped me out. I forget the link though, so just do a search!
Hope that helps at least a little!!