A toy store in Hawaii has near-mint condition vintage Lego sets for sale. Apparently back in the 90s, the owner of the store was able to acquire them after meeting a distributor
LEGO 6653 Highway Maintenance Truck Set Parts Inventory and Instructions - LEGO Reference Guide
LEGO 6653 Highway Maintenance Truck | Brickset
LEGO 6653 Highway Emergency Van Complete with Instructions and Box Cutout | eBay
LEGO set 6653 Complete in Box 1982 . Classic Highway Emergency Van | eBay
LEGO 6653 LEGOLAND CLASSIC TOWN HIGHWAY EMERGENCY VAN 100% COMPLETE 1982 LEGO GROUP DENMARK - Boonsart shop
LEGO Town: Highway Emergency Van (6653) Complete with Instructions | eBay
LEGO 6653 Highway Maintenance Truck Instructions, City
LEGO 6653 Highway Maintenance Truck Set Parts Inventory and Instructions - LEGO Reference Guide