you looking for an Magura A buegel ?
59 - 66 reach ?
I found one for you .. I do NOT have the steel clamps which hold the pistons ( but they are universal no matter what size )

let me know if you are serios getting it mailed over ?

thor

p.s. for all the other Brommie folks who would kill for better brakes, SORRY I only have ONE .... and that one is reserved for Somnatash :-)