I need to obtain a ferulle. I'm unsure of the type of metal it is made from. As I am struggling at the moment, I would be willing to use any sort of metal. The dimensions are: internal dia 4mm (so it fits snuggly as in photo). External dia 7mm. Length 8mm. I have tried using different search terms on e bay, but nothing remotely like it comes up. I'd be willing to cut it from the end of a piece of pipe if diameters matched. Can anyone help or advise with this please? The photo below shows the good ferulle slipped on to one of the pegs. The other peg without ferulle can be seen at adjacent side.