I don't believe the D88 "Multi-Color Nose Strips" option was ever actually released for production. Although it's in the AIM, the time required to introduce the stripe into production, and the almost instantanious time frame to which it was cancelled, would have negated the option entirely. This time frame (per the AIM) is as follows:
Introduced on December 27th, 1967
Redrawn on February 1st, 1968 (34 days after the introduction)
Cancelled on February 28th, 1968 (27 days after the revision)
In my opinion, this was not enough time to place into production.
However, I could be wrong (and have been before), so I'll let one of the CRG guys confirm (or deny) my theory!!