11-7/8" is pretty close to 12".
If you plan to use that pressure plate, the less expensive steel wheels won't work. They only feature 11" Long patterns.
For the 11.5"/12" pattern, you have to go with either a McLeod or Fidanza flywheel. They both have those patterns.
Both are SFI rated.
The McLeod wheel weighs 40lbs.
The Fidanza wheel weighs 14lbs.
The McLeod is $389 + shipping.
The Fidanza is $385 + shipping.