Stitching together non 360 footage

I have a rig with 3 of the same cameras all at different angles - Front, Left and Right (which are at 90 degrees) that Im shooting with, that I would like to try to stich together if possible to make it as seamless as I can.

SInce its not a 360 and from what Ive seen thats all that really does stiching like I need, I was wondering if anyone has any 3rd party/plugin suggestions that could get me there.

Thx!