Oh is it the Paris biz jet
There ya go! Yep, the Morane Saulnier MS.760C Paris III.
that was based on that French trainer with the V tail?
No, the V-tail was the the Potez-Air Fouga Magister - which was the rival to the Morane Saulnier MS.755 Fleuret (which the Paris was based on). The Fleuret lost out to the Magister...
Morane-Saulnier MS-755 'Fleuret' - MS 755 Fleuret - Entrainement - Un siècle d'aviation française
Take it away Jim...