These are the only three chips with the words "Super Bowl" on them. The words "Super Bowl" are copyrighted by the NFL. In order to distance the NFL from gambling, the league refuses to let the words appear on gaming chips.

A number of these chips made it into circulation. Any chips for the Super Bowl now use slogans such as "Super Sunday", "The Big Game", etc.

All three chips are listed in the latest "Chip Rack":

Tropicana N4506
Four Queens N0505
Circus Circus E0257

$50 for all three + $2 S&H (your risk) or $6 USPS Priority Mail + $50 USPS insurance. Shipped in a bubble mailer and in air-tites. First link to this post gets 'em.