I recently purchased a Speedster windshield(Pilkington, DOT approved) from a distributor named "Prosource Glass International" for $270. Shipping would have been another $75, but I picked it up at their warehouse. Bought in multiples of five, the price drops to $250 ea.; in multiples of eight, $220 ea. I'm not sure of the shipping cost for multiple orders.
They are located in Andover, Mass. They handle "antique, classic, exotic auto glass and mouldings.
Contact Mr. Richard Tankel at 1-877-345-2800.