There are some adapters that fit plugs and step up or step down the voltage. Your local electronics store should be able to help you. At the worst you can just by an adapter to plug into the socket adapters you already have - for example, from the wall it would go socket adapter->power adapter->camera cord. Is that the kind of thing you are asking about?
what's the model and manuf of the digicam? i know kodak has a travel kit with special plugs produced just for this type of dilemma... if it's a current model, check best buy/circuit city/compusa, ect for that model on those sites... then ckheck under accessories on the same page... it worked for me. good luck!