Obviously the proper BSA ones are best but hard to find, they do occasionally come up on ebay but not very often. I have seen them and they don't seem to attract much of a price. My BSA ones are as you can see fitted to bike. The Britax ones are in the next photo and were not so good, my pillion passenger complained of them being in the way. I had to make up a bar to extend down to the pillion foot rest hole in frame, picture explains better than I can. I'm not sure of the front bars and not entirely sure what I have.