Hi Danny I have to be honest with you I don't think there is that kinda of converter.Let me tell you that if they where saved as a SONG when you change them to midi it wont sound that good.An alternative is to find someone with a wk8 or wk4 in England.I will try to contact a friend of mine in Italy to see if possible.I hope you have copied the work you had in the hard disk.
good luck