Where can i buy a SSFII Turbo cabinet?

[Nine Inch]

Anywhere online?

[megaultrasuper]

check ebay and craigslist. Also post in the B/S/T sections of this website and many other arcade game type websites like:

arcadecontrols
killercabs
neo-geo.com
shmups.com

and other big sites like ign.

Also note:

You need not buy a "Super Turbo" cabinet. Practically any upright fighting game can be converted over into an ST machine quite easily, and a whole lot of other standard JAMMA games as well.

You should probably do a lot of reading on this subject before committing to buying anything.