The clutch hub you need has a 1" x 23 spline. There are many available. Porsche 944, all 911's with the G50, many Fords, (Mustangs, Areostar minivans, Bronco II) and Chrysler products. (Dodge Dakota, early Chargers & Challangers) Although I see that you are in the UK so I don't know how many of these are available over there. One of the major performance clutch manufactures used to have an on-line listing by make with the spline sized but they don't anymore. Now they ask for make and model so it would take forever to find anything.