Hello Mand and welcome to Eribafolk 
I've moved your thread from the Blog pages to allow members to reply to you.
Firstly, which type of Eriba Touring are you looking at and what age? A Puck, PuckL, Pan Familia, Triton or Troll? ( they are in size order, smallest to largest).
Does your Mini have a central exhaust outlet on the back? What is the engine size?
These are the details that folk will need in order to advise you.
Randa