Good quality big ball end brake or clutch levers for Lambrettas made by CUPPINI. These can be used on all series 1 and 2 models but were used on the GP originally, as the ball end on earlier models wasn't deemed big enough by DVSA (as for now) not to cause injury. 
 
These are now sold individually as a lot of people want them  to match an outboard disc lever, so if you require one for the clutch and front brake, make sure you order 2.