* Specialty Auto Glass Shops: Contact auto glass companies that specialize in classic cars or vintage vehicles. They may have access to a network of suppliers or be able to custom-make one. Be prepared for a long lead time and significant expense.
* Online Classic Car Parts Websites: Websites specializing in classic Chevy parts may list a windshield or have leads on where to find one. Check sites like eBay, Craigslist (check frequently as listings are ephemeral), and forums dedicated to classic Chevy trucks and vans.
* Classic Chevy Clubs and Forums: Join online forums and clubs dedicated to Chevrolet trucks and vans from that era. Members often share information about parts suppliers and potential leads.
* Junkyards (Salvage Yards): This is a long shot, but checking junkyards specializing in older vehicles is worth a try. You'll need to call around extensively.
* Custom Fabrication: As a last resort, you might need to explore having a windshield custom-made. This would be expensive but might be your only option if all else fails. You'd need to find a company specializing in custom glass fabrication and provide them with the necessary dimensions.
Remember to be prepared for a significant cost and potentially a long search. The age and rarity of the vehicle mean the part will likely be expensive and difficult to acquire.