dear all
after all that fuss about part numbers and lathe work, the solution was a simple one.
I put a car jack inbetween the rear footrest mounts and opened up the frame a bit.
after removal the frame was seen to have the correct width between the plungers
and the rear axle went in with the brake drum just right.
the next stage will be for me to rebuild a new wheel onto the hub i have. And that will mean paintingthe hub first so i will need to find the right color !
More soon.
Many thanks for all the help advice and encouragement....invaluable !!
best
JW