Some owners in North America have used Sato frame sliders: DUCATI SPORTCLASSIC 09 SATO RACING FRAME SLIDERS PUCKS | eBay Unique Frame plugs and Frame sliders - Ducati.ms - The Ultimate Ducati Forum This company in the US seems to carry quite a range of accessories for the Sport Classics: JC/PAKBIKES Sport Classic Specialties Might give you some ideas, hopefully you can search for UK based suppliers if you see anything that appeals to you.
