Oh right, they were four-packs. Whoopsies. I blame Information Creep

Granted, but they are mail-away specials only like the good ol' days. The antiquated mail system gets banked up and orders get lost. You only manage to collect 2/3 'reflector' components required, and Spectro becomes a scalpers dream on eBay.

I wish that one of the Holy Grails of tfwiki, the Hot Rod go kart, was found and they took photos of it!