Does anyone know if software (online line or not) exists that allows to you convert one 'past' currency into another 'present' currency.

ie convert the value of something in 2002 in US Dollars into a current value in UK Pounds (ignoring depreciation or whatever).

I know I could do it all myself using past data for exchange rates and then inflation rates, but it would take ages and I have a lot of these conversions to make.

Anyone have any idea?