One of my rear stub axles broke and I replaced both with new billet steel ones. I have the other old one for sale. It should be magnafluxed before installation. I know it fits a MK II sports racer and think it might apply to MK I (de Dion) and MK III SR's. If you are interested let me know and i will send photos and dimensions. Tell me what it is worth to you. If it will help you get or keep you Elva on the track let me know that too. bobengberg@aim.com (USA)