Franke tap (Crieff PH7)

This is Franke Pescara XL tap which would have cost £700 new. We got it as part of an ex-display utility room. It's not been used as far as we can tell. We've been unable to fit the tap because there is piece missing which connects the two pipes together which you can see in the second picture and we've not been able to find a replace part. If someone feels they can do something with this tap they are more than welcome to have it.