Hi! Welcome to the forum. There are members here who offer NT writing services if you're after the trophy or the av
NT collabs are common on neo but, in the context of a cheating forum where people want to keep their neopets identity private, I'm not sure how collabs work unless people just want to give you jokes/scripts and don't want credit on their neo account.
You might be better off seeking collabs on neopets itself, it's probably safer!