I have three, but just because I had the ring sets laying around. A Big Bertha, a Red max and one scratch build that has since floated away. AND we forgot about the ThunderStar, the X-Prize kit.
That said, I'd bet significant body parts that the rocket in question is a scratch build.

__________________
Bill Eichelberger
NAR 79563

http://wallyum.blogspot.com/

I miss being SAM 0058

Build floor: Estes - Low Boom SST Semroc - Marauder, Shrike, SST Shuttle

In paint: Canaroc Starfighter Scorpion Centuri Mini Dactyl Estes F-22 Air Superiority Fighter, Multi-Roc, Solar Sailer II, Xarconian Cruiser Semroc Cyber III

Ready to fly: Estes - Solar Sailer II Semroc - Earmark