Just bought a new Speedster windshield (by Pilkington, DOT approved) from a distributor named "Prosource Glass International" for $270. Shipping would have been $75, but I drove up and picked it up at the warehouse. They are available either clear or lightly tinted.
The company is located in Andover, Mass. They handle "antique, classic, exotic auto glass and mouldings". The phone number is 1-877-345-2800.
The owner, Mr. Richard Tankel, says that for an order of 5 units, the price would be $250 each. For an order of 8 units, $220 each.
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