Go to Team Update 3, which gives you two source catalogs for FRC minibot parts. The catalog link to the expanded acceptable parts list is:
http://www.legoeducation.us/FRC
You will find both the 180 deg. servo and continuous rotation servos there. I believe it about 9 pages long, with considerably more parts available then at the Pitsco link.
Also see EMail Blast dated Jan 20, 2011, which states that you can order Tetrix complete kits or components from this site.
