It certainly is. Its the Multiversatile Mercury (double sided). Stopped being made when Pilks first went down the pan.
Original style have bought the Dorset and Woolliscroft name but this range didn't carry on when they took over. Shame though, it was the most popular of all of them.
Anyway, follow the link below to the current Dorset ranges. Anything in the Steel Grey will be the closest match colour wise, but you'll have to make do with an alternative pattern...... Unless someones garage or shed can offer you a positive result
🙂
Anti Slip Tile Products | Dorset Woolliscroft
IMO, either the Pinhead or the Multidisc would be the best options.