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I didn't find any information on Stambecco slope. Judging by the description here
https://www.carosello3000.com/en/winter/pistes-and-fun-parks/livigno-ski-pistes
it may be VALLE slope starting from the top of Fontane Vetta, but here https://www.skipasslivigno.com/en/lifts-and-slopes/ VALLE is marked as black and there  Not sure how Blesaccia 2 top -> Fontane Vetta top segment is called.

Canalino slope is suspicious too, https://www.skipasslivigno.com/en/lifts-and-slopes/ this says it starts from Carosello 3000 I