I can’t find any CB3 v1 hotend in the webshop, is v2 compatible with my CB3?

Yes, in fact we do not sell any v1 CB3 hotend anymore. As of 2019 Q3 we have discontinued it and intorduced the CB3 All metal hotend (v2), which is fully compatible with all our CB3 printers. You can find and purchase it in our webshop here: https://craftbot.com/item/craftbot-3-all-metal-hotend-2-0