No one as far as I know, I sure some have done this in small batches, or one-offs. What are your trying to achieve, I race a 67 MGB in vintage racing, have 30 years of racing experience with these cars, and never saw a need for it. Now if you are talking rear hubs for a a banjo rear end, many us, self included are running what is referred to as hybrid, meaning the the banjo housing cut on the end then weld back the ends of the alter tube axle housings, so we get the safer hub retention, and the stronger axles. Year ago we made some aluminum hubs for the Spridget, but only sold a few sets of them, not many people lining for a $600 set of hubs, when the stock one works fine