Dellorto 20.5 carb parts

hi all,
ive lost the little part that holds the cable in the slide. does any 1 know where i can get another 1 from.

also when i took the float bowl off a tiny tubular brass thing fell out n i have no idea where it came from lol nothin like that was in my old webber carb any ideas??

 

i couldent actually find the little piece after about an hour of surching.i dont even no what its called lol

 

cheers mate