John
If you look at the parts illustration here, after measuring I had grinders cut (with a very fine disc) 67-6028 & turned one piece around so it became the spacer in your diagram
ie passing through the cover butting up against the spindle sleeve 67-6027 & holding the rubbish pattern cover in place.
The spacer in your diagram is the plunger spacer which has wrong internal diameter.
The other cut part is then used to space the hub from the frame slot giving the appearance of the spindle itself being slotted as 67-6047 which is unobtainable
when using the swinging arm spindle, 67-6161.
Anyone going this route & using a plunger sprocket 67-6123 (the only 46T sprocket I could find, beware, some are made of chocolate!) will also have to get the stub axle bearing ground on both sides otherwise there will be issues with the bearing retaining clip in the sprocket housing, the brake plate & slot in the stub axle engaging in the frame slot.
You cannot use the plunger bearing as ID is wrong so you must use another 65-5883 which is slightly wider & get it ground.
There are I'm sure other solutions but this was the best I could come up with for my situation using the hub I had.
Cheers
Rusty