I found a few uk new part suppliers just by entering the part number on google. I dont know whether they will ship to the IOM .
Normally I would suggest entering your requirements in a used parts search site. Various Car breakers with a suitable donor car will quote their price. But as its pressed steel it may not be in great condition and would involve the cost of removal from the donor car. And they still might not ship to the IOM.
If used is an option you could try a local car breakers. Even if there is not a suitable Jazz on the Island they may have suitable contacts on the mainland.