What size flywheel are you looking for? How many teeth? RockAuto has 143 tooth flywheels for pickups with 360 Magnum and LA for about $100. If you need a smaller one, you could have a 318 flywheel drilled according to the M.P. engine book. The info should be available online. I had a flywheel done for an LA 360 25 years ago, cost me $65.00 back then. I would guess it's $100 - $125 to do that today.