Can you pick these up anymore?

Level T16 map, +2 level monster - then hope?
corrupt a socketed Lvl 19 gem?


Wahts the best strategy to get it?

Tbh idk but i haven’t seen any gems listed which were above lvl 19 +1 corruption so lvl 20

thanks - im in the 90's and not managed to pick one up (doing T16+2 reguarly and pinnacle)