Half a timken roller kit will fit the bottom of the frame. You are on your own for the top, nothing caged was ever made for that. You just gotta find the part numbers na dorder them up. The top cone is a tough one to get. Know a machinist who won't rape you? That might be a good bet, especailly if you are using a different front end than stock.
this rigid frame is factory,i believe he said it was a 1952 frame,anyone know part numbers or kits to get away from the loose bearings in the neck?Its bottom bearing cup is cast as part of the frame.