Leaf springs are generic. Go to a trailer supply company. You need to know the type you have, the length and the number of leaves.
Look at the shape; Is it a Semi-eliptical (probably) or quarter eliptical, or 3/4 eliptical, etc?
Look at the ends; Is it a Double-Eye, OPen eye Slipper, etc?
What is the distance between eyes?
How many leaves?