I would definitely save my duckets and coins and buy a set if I could get them that cheap. They're $500 from NISMO or Nissan IIRC.
I need R200 gears too. I won't have money for an SAS for a LONG time and I need to keep it IFS, that means re-gearing it to make it more useable...and it's not getting re-geared at $500 per axle. No way in hell.
I bet TONS of other people would jump on the chance to get cheaper gears.
If I remember right, they used a 10-bolt ring gear for some H233B diffs and a 12 bolt for others, so you may want to figure out the most commonly used pattern and go with that as a starter, unless the gear company is willing to do two designs for the same axle as a first run or something.