Yes. I've always had good dealings with the place, but I hear that the seller can be, shall we say, a bit over-convinced about his own opinion.
Whatever, the seller posted a picture showing the connectors on the Ducati regulator and the ones on his regulator, both with a Vernier gauge on them showing that they are both 4 mm plugs. The difference is, the ones on the Ducati regulator are a smooth cylinder, 4 mm all the way down, and the ones on the Silent Hektik regulator are shaped like most other bullet connector, i.e. 4 mm at the base end, but tapering down a bit towards the pointy end. They are, however, no doubt good quality connectors. The Silent Hektik bloke is picky about connectors.