* Online Classifieds: Check sites like Craigslist, Facebook Marketplace, eBay, and specialized classic car sites. Use very specific search terms like "1983 GMC Vandura cargo van windowless," "1983 GMC Vandura blank van," or "1983 GMC Vandura box van." Be prepared to expand your search geographically.
* Specialty Dealers: Contact classic car dealerships or those specializing in vintage vans or work trucks. They may have leads or know someone who does.
* Auction Sites: Check online auction sites like GovDeals (for government surplus vehicles), or local auction houses. Government agencies sometimes sell older vehicles.
* Van Forums and Clubs: Join online forums or clubs dedicated to GMC vans or classic vehicles. Someone within the community might know of one for sale.
* Word of Mouth: Talk to mechanics, body shops, and people in trades (like construction or delivery) who might have connections to older commercial vehicles.
Keep in mind that a 30+ year-old van will likely need significant work. Thoroughly inspect any potential purchase for rust, mechanical issues, and overall condition before committing to a purchase. A pre-purchase inspection by a mechanic is highly recommended.