A Cherokee Six is a PA32-300
A Piper Lance is a PA32-300R (?)
A Piper Turbo Lance is a PA32T-300R or a PA32R-300T (?)
A Piper Saratoga fixed gear is a PA32-301 (?)
A Piper Saratoga retract is a PA32-301R or a PA32R-301 (?)
A Piper Turbo Saratoga is a PA32T-301R or a PA32R-301T (?)
A Piper 6X is a PA??-???
A Piper 6XT is a PA??-????

Does anyone know of a website that provides all the different
designations by model?
Piper's and Cessna's websites are useless for finding this information.