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 MOC Trailing shoe distributor for Claas Xerion 5000 or Fastrac (Schleppschuhverteiler) by RB-instructions | Rebrickable - Build with LEGO
LEGO® Education Distributor | Becker's School Supplies