Best place and cheapest place for coil lift springs?

[BleednBlue68]

Im liftin my Ford van. The biggest lift springs i've found is 6.5in. Which is plenty then puttin 3in body lift. Know anyplace that carries these springs at a good price? Its a 79 f250 with van suspension up front and a slightly modded 460. No leaf springs. It was converted by Pathfinder conversions in cali. Its a muddin machine. Does great at mud runs . Want to put 35 or bigger tires on it. Any help would be great!