Tony,
As mike sugested Spray'Ngo is an excelent reagent product, based on sodium metabisuphite, which I would recommend to all.
However, as its' name sugests, it is a slow acting product which does its' main work in the first 40 minutes or so, then remains active till dry.
It can be obtained from Chemspec, who also produce, in their RX range, an alternative "Juice and Dye Remover".
This product is faster acting - apply, dwell, blot, rinse - and can also be removed by the thermal transfer method. What I tend to do is to use this first and on the rare occasion that the stain is not completely removed, follow up with Spray 'N Go, informing the client that the staining MAY improve over a period of 8-12Hrs.
John.