If you want the commercial to be effective, it would be a bad choice to make the selection based on the fact you happen to have the suit. Your idea would be great if an insurance company hadn't already saturated the airwaves with gecko commercials but it would look like a copycat version of their work now.
See if a costume shop would be willing to trade your suit for another animal that would be viewed as an original presentation. There's certainly no shortage of animals threatened by deforestation.
