They aren’t available I’m afraid. Most people adapt another make of skimmer to suit the Trusty disc to get over the problem, but don’t stop looking for a genuine one, they do come up occasionally but you will normally have to buy a whole plough to get the skimmer.

That’s normally the case but when the original is so rare there has to be a certain amount of discretion used. So long as it looks and works in a similar way to the original nobody will pick you up on it.