Stained Carpet- Need Rear Floor Guard

[cwilliams21]

Well my 6yr. old daughter was kind enough to grace me with fruit punch stains on the rear center passenger carpet, and I'm not talking about stains on the removable mats but actually on the non-replaceable fabric.. The fruit punch had roughly 2-3hrs to set in so it’s pretty set in .. I tried just about every cleaning agent possible and all have failed to budge the stain. Soo I'm resulting in trying to find a mat that will stretch all the way across the rear passenger floor board. I haven't been able to find anything online... Does anyone know where I might find something like this?

Thanks!