At the end I tried the suggestion and went for BMW handguards kit for S 1000 XR (part No. 77328553967)
They fit but for fixing them it is necessary to use a 2 cm washer because the provided bush is not compatible with the bar end in addition the it is needed a M8X55 screw, since the standard one becomes too short.
Unfortunately the handguards interfere with the PUIG windscreen and also with the OEM one
(I suspect that is due to the fact that I've rotated forward the handlebar)
Last edited by marci; 05-06-2019 at 06:31 AM.