Not entirely sure which forum this should go in as it's not technically a classifieds.

Does anyone have experience in ordering parts of the carbs for our motorcycles (i.e. not from Triumph).

the part i'm looking for (pictured below in terms of location) isn't on their 'order' list but it's the final piece to fix my original stock carbs.

Is it likely something from the carb makers or a specialist supplier? If so, does anyone know where?

the part is below (small bronze tube) and whilst i can't remember the name off the top of my head (a 'something' sleeve) i do remember it hard a part number...

any advice would be much appreciated, i figure i can either fix these up and sell them on or more likely fix em up to swap them round.

Ant