If WDW mail order can't help you, I'd try DisneyLAND. There is a Monsters, Inc. themed ride at California Adventure; the gift shop for it is bound to have a Mike. Their number is 800-362-4533; the email address is dldelivears@disney.com
I emailed both DW and DL, and DW replied back this afternoon saying they have one! I truly appreciate the advice. My son will now be the happiest little guy on the planet!
If that falls through, let me know. I think ours is just sitting in the toy box along with a big plush Sully. Since you're an Oklahoma girl at heart, I'll mail them to you if you want!