don't know if the same as the earlier sprint st but things like the front indicator lens doesn't come available separately, they are £40 for the complete unit, spares were a nightmare and paint corrosion on ally parts lifting , hopefully better on newer generation.
coming back from France today passed a nice xjr1300 on a French motorway cruising around 80, they allways look well looked after, Ive known around 10 12's and 13's and all have been kept up together. if you want to speed up handling on the xjr there is a mod to fit R1 front end that works.