Wow! Now that is a vintage laptop! I had one many years ago! I cant remember if the power socket for this was a standard round pin type or a type unique only to that series of laptops. If it is a standard type the dc connection hole will be round with a pin in the middle in which case you could get a switchable ac adaptor with interchangeable heads and set the voltage/amp settings accordingly. If it isnt then you can try to track one down from ebay, old computer part specialists, laptop specialists etc.