Can anyone tell me what the diameter is for the exhaust for my Falcon 67 and any suggestions where to get one. I have been trying Armour for around 12 months and get no reply then I phoned them and was told they were out of stock and 2 months before they had stock. 4 months later I emailed them and their reply was that they had told me they were out of stock and it would be several weeks before they had more. I have my doubts they have not had any for almost 12 months so is there anywhere else I should try please. Being in New Zealand makes it a little hard to find anything.