I remember back in the dim & distant '70's when I was part of the team that re-built the Shuttleworth Mk V Spitfire to flying condition at Duxford, we had the same problem with the starboard oleo. Give the techies at Old Warden a call, they may be able to help you, as we had to have it rebuilt. I think Dowty Rotol did the necessary, but I'm not 100% sure. Good luck.
