Cheapest I found was a 2nd hand leaf spring from a VW Caddy. Payed more in shipping than the actual item cost
. Seller was totally honest with me, and the spring is some 150 cm (roughly 5 feet.), and weighs 13kg (28Ibs). "Great!", I thought, "Raw material for 2 prods!". Not so, thickness tapers towards the tips, close to 15mm at center, and down to some 10mm at the tips. Not sure it'll bend at all...
