There's Costco/Sams Club, that stocks Eggbeaters I think.
You can do a search for Eggology, which Ronnie Coleman uses (has them in his video for that moment anyway!).
Lana's Egg Whites, can be ordered online...I think all three I just mentioned can be Googled and you won't have any trouble finding them.
Sometimes you can even go to a local farm around your area and talk them up, and they'll give you a deal on eggs or whatever.