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I thought that was what he was asking for Wendy . . . Where does he get the product coil (which is what that shiny stainless twisty thing is in your picture).
OP - I'm afraid that the place I know of is reasonable for the product coil . . .but damned expensive for postage. . . .One place you could try is Paul at Harmony Hut on eBay I'm sure he has had some for sale.
Alternatively there is Nomanumpa on eBay he may have some
Failing that perhaps jamesb on here might be able to put his hands on one :whistle: :whistle: