Sorry for the late reply, I've been in Peru the last couple of weeks.
The mods to my tt-33 consist of a muzzle brake, ventilated trigger,1911 grips and reblued with birchwood casey super blue.
The grips are Pachmayr colt 1911 rosewood grips with decelerator rubber finger grooves from the sportsman's guide ($24.00) I'm not sure but I assume that any 1911 grips would work. All I had to do was remove about a quarter inch of length from the top of each grip, or the bottom which ever you prefer.
I let the grips protrude a little past the bottom of the frame so that they are flush with the bottom of the clip. I just sanded the top of the grips with a belt sander keeping them rounded off, the rosewood sanded easily and didn't even need to be restained. at first I mounted the grips with double stick tape which worked fine, later I drilled and tapped the mounting holes. The whole project took about an hour and a half. I had already removed the lanyard loop with a small punch for another set of grips that I made myself. It can be put back in place when I want to use the original grips.