Artificial Brown Sugar Sweetner-Where??

I have some recipies that call for artificial brown sugar sweetner. Where the heck do you fine it? I've looked at all our local grocery stores, publix, albertson's, winn dixie, wal-mart. K

Twin Sweet Brown sugar is at my Publix.

My favorite brown sugar substitute is Nature Sweet (avaible at www.netrition.com or at some local healthfood stores). Doesn't have the nasty after-taste that Sugar Twin has. Or Take equal measurements of Splenda and Sugar-free maple syrup and stir them together. Works great mixed into batters and such.