Options besides Optifast and some tips!!!

Is there any other options out there besides Opti-Fast that you can use pre-op? I am tired of the same flavors and want to try something else because Opti-Fast is too expensive and getting very boring! I was thinking maybe Slim-Fast but it has to be something that can do some of the same things optifast does!
Please Help! Have to be 282 by Novemeber 12. If you have any other ideas please let me know!

Slim fast but the low carb version or EAS AdvantEdge Carb Control

Sugar Free Instant Breakfast... It's yummy too. Mix it with Skim Milk.
I used that after I burned myself out on the opti-fast.