Hi gpo,
Whether the stand would fit or not depends on the frame mounting lugs?
The lugs for the stand in the links are different to other/later A or B frames
Attached pic is of the lugs for the forged stand, a reinforcing half tube fits between the lugs and is welded to the frame cross tube to act as stops for the stand
A friend sent me this pic from USA
The original stand was made from two parts, in the second link the stand weld can seen to be cracked which is common
I would be sceptical of the quality of the imported stand??
Autocycle Engineering had new stands made in UK the last time I was there (1 piece construction)
I have just spent a lot of time making new frame lugs and reinforcing piece for my 54/5 B31 frame
along with repairing /re bushing the stand, (its going to be a "Goldie" Special
)
John