Have a very rare car and can't find out any information on it. I would like to know more if anyone knows anything about the car. I have tried Buick club of America but car is very rare so not much about it at all.

alot of info here

1940 Buick Limited Model 91 Formal Sedan: Giving Cadillac a Run for Its Money | Autoweek

Series 90 Limited, wheelbase - 140,0 inches:
90 8-passenger Trunkback Touring Sedan, 4608 pounds, 2350 US dollars, 686 built
90L 8-passenger Trunkback Limousine, 4653 pounds, 2453 US dollars, 543 built
91 4-door Trunkback Touring Sedan, 4568 pounds, 2074 US dollars, 382 built
15k photo of 1939 Buick convertible coupe13k photo of 1939 Buick Special 39-46C17k photo of 1939 Buick Special 39-41C----- Chassis, ? pounds, ? US dollars, 176 built

Engine: 141 (107 - 40 Special) hp/?rpm, Straight 8 - cyl, 320,2 (248,0 - 40 Special) cid
Bore/Stroke: 3,44/4,31 (3,09/4,13 - 40 Special) inches

Does any one know how to find out how many of the 382 of these cars are left?

you would have to look and see if there is a owner registry which i kind of doubt being so few made