Yes , I remember watching that Cup final and wanting Ipswich to win. I was young then and didn't read papers etc, so it wasn't until later that I realised that victory stopped us getting into Europe!
Try using the activate acoount option in this link
http://www.ccfcshop.co.uk/activ.aspx
it looks like you needs your season ticket reference, your surname and your postcode.
You should already know the last two :-)