Is there a star device associated with the NDSM for the 87-96 time frame?

No star unless authorized award of the NDSM during another qualifying period.

AR 600-5-22, 2–10. National Defense Service Medal,
b. It is awarded for honorable active service for any period between:
(1) 27 June 1950 and 27 July 1954 (Korea), both dates inclusive.
(2) 1 January 1961 and 14 August 1974 (Vietnam), both dates inclusive.
(3) 2 August 1990 and 30 November 1995 (Persian Gulf).
(4) 11 September 2001 to a date to be determined (Global War on Terrorism).
d. During the period listed in paragraph 2–10b(3) for Persian Gulf, Servicemembers on active duty, members of the Selected Reserve in good standing, and Servicemembers of other than the Selected Reserve who were called to active duty will also be eligible. Servicemembers in the following categories will not be eligible for the NDSM:
(1) Any Servicemember on active duty for the sole purpose of undergoing a physical examination.
(2) Any Soldier of the Individual Ready Reserve, Inactive National Guard, or the Standby or Retired Reserve whose active duty service was for training only, or to serve on boards, courts, commissions, and like organizations.
g. To signify receipt of a second or subsequent award of the NDSM, a bronze service star will be worn on the Service ribbon by U.S. Army personnel so qualified. A second or third award of the NDSM is authorized for Soldiers who served in two or more of the four time periods listed in paragraph 2–10a. It is not authorized for Soldiers who met the criteria in a one-time period, left active duty, and returned during the same period of eligibility (see chap 6 for service stars).

No I have a star because the Vietnam era went to 1975, I went in in 73., and in later part of the 80's opened a new era, and I didn't retire till 95.

Only other person in the Army I knew with that last name, was me.