go w/ Brembo or Bradi 'blanks' that are cross-drilled/slotted & zinc-coated...
You should be able to get a set of '91-'96 NSX
Bradi or
Brembo 'blanks' that are cross-drilled/slotted & zinc-coated for ~$250 +s/h from a myriad of vendors. All 'budget' after-market cross-drilled/slotted rotors will be machined after-the-fact (
making the holes & slots/grooves); Brembo discs are either cross-drilled OR slotted & Bradi is another brand-name for markets not covered by Brembo (both are the same company).
The reason to go w/ Bradi or Brembo 'blanks' is due to conformity & QA/QC across-the-board, the discs will be uniform in terms of the hat/hub/etc'. The non Bradi/Brembo 'blanks' are all over in terms of quality (their origins vary, ranging from Brazil/Mexico/China/etc' meaning of the 4 discs: 1 may be from Mexico, 2 may be from China, and 1 may be from Brazil).
Use the
search for past experiences, there's a lot of good information available here on 'Prime.
Check-out
www.r1concepts.com, and ask for the Bradi or Brembo 'blanks' w/ cross-drilled/slotted & zinc-coating (they aren't on the web-site, but R1Concepts will gladly provide them for you). The boxes will be labeled as Bradi & Brembo, and come w/ a certificate for each disc. Let the vendor know from the start you know what you want, and it has to be genuine/authentic. . .
If Bradi or Brembo discs are N/A for the NSX (my aforementioned comments/insights were from 3-4 years ago), then ask for a set of non-descript' front/rear in which they are guaranteed to be uniform (the hat/hub/etc') prior to shipping!
G'luck!