Purchasing Enhanced IO interface

I have the original serial lead, no external IO. I now have a wide band sensor/controller giving 0-5v output, want the enhanced IO interface, can i just buy one? without sending my old one back, I'm in England UK, postage will cost a bit so need to weight up cost of buying a new interface and cost of sending mine back for the upgrade......

if you'd like to buy one it would be $649 outright & would come with 8 credits to purchase licenses of your choice...otherwise I believe you still must send your old one back. Not sure how much it would cost to send it back but the old interfaces weigh less then .5lb :shrug: