When you find out what bore it is(43mm o/d i do believe) then use these guys http://cgi.ebay.co.uk/Exhaust-Reducer-Connector-Adapter-Made-Measure-/220687177147?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3361fb15bb#ht_1794wt_1174Very good service and next day delivery.
They are the same bore as the 1.8 if im not mistaken and i recently had the vernier gauge on one and it was 43mm o/d