Yes if you can find a piece of pipe slightly larger the side opposite the brake drum it is just a matter of of siting it in the pipe with the drum uppermost and with a drift in the outer bearing race drift the drum off. It is then just a matter of having a piece of pipe larger than the centre hub and repeat the process.
After plating it is just a matter of having two large washers and a long bolt to press the hub together.
I think I may have mentioned it before that if you cant find the taper bearings, we have have used alternator bearings 6203 I think. Now the outer is too small but with the use of some stainless strap from a timber strapping machine a perfect fitting circle and spacer can be formed.
Also I see the old problem cant get imperial roller bearings not stocked any more. Not true. Dont go looking for separate rollers. Nortons etc have a roller bearing with about nine rollers and the rollers are quite easy to remove. I jump on anything bearings at swap meets to see if any are there.
regards Alan