I think that the price shown on your link would only refer to the individual replacement keys and not the full keyboard. I recently obtained a replacement keyboard for my EasyNote and I obtained it at a price of £50. Mine was not the same EasyNote model as bturner's though. I had paid about £4 for individual replacement keys.
Soak the keyboard in warm soapy water, rinse with warm water, wrap in a towel and leave in hotpress for a week or so, To test, seal it in a plastic bag and return to hotpress for a few hours, if no condensation you're good to go. Repeat if necessary.