My youngest son is into models, he would like to build a 78Z28 model & add it to his collection. Where can I get one?

MPC "STREET SAVAGE", 1/25, # 1-0737
MONOGRAM "MIDNIGHT Z", 1/24, # 2717
MONOGRAM SNAPTITE, 1/32 # 1019
LINDBERG "WT-90", 1/24, # 6502

there are a few model stores that specialize in selling old/discontinued kits. hope this can get you started. good luck.