Originally Posted by shockwaveriderz

Rocket Supply Co purchased AMROCS in Late 1969 or very early 1970. The Quasar was probably a Rocket Supply or Amrocs model rocket then when they folded their inventory was sold to SAI .SAI bought out AMROCS/Rocket Supply company which was started by Lindsay Audin.(Amrocs was started by Lindsay Audin.) Estes Industries supplied re-labeled model rocket engines to Rocket Supply Co.

EDIT

Found the following in the June 1970 MRm Article on the Pittsburg Spring Convention article:

"SAI announced the purchase of the entire Rocket Supply(AMROCS) line ... Perhaps the most
interesting of their new models is the Quasar, a high-performance model employing a single core engine, and three strap-on pods, which are jettisoned at burnout"

Edit 2 SAI Quasar was flown at MIT MR Convention April 1970. Turned in a perfect flight with all 3 strap-ons and center core firing.