I have been lucky...
I have a front crash bar on my A10 made from Stainless steel, probably not made by BSA but its identical to those that were.
The front crash bars seem to come up quite often on eBay but NOT the rear ones. I am lucky to have recently won some original rear ones and waiting for them to arrive.
I do have some rear ones on the A10 now that were made by Britax, they are Universals and Okay if your not carrying a Pillion rider who has long legs! I might be selling them when the proper ones arrive.
The front bars may well go on either of the Swinging arm, Plunger or the rigids. But Rear crash bars are likely to be difficult locating for all three models.
Hope this helps.
