The Doorhack is a platinum VIP item you would have to reach out to Syle for. Teleports are around the map but are in some houses. I don't understand what you mean by "unknown items"

I do not understand why you have to bring DOA into me answering your questions. Platinum VIP has been a thing, you just have to request it specifically through Syle. There is no standard option for it because it is kept on the hush and exclusive. If you find any of the doctor who phonebooth's (I know they are called Tardis's) and hit your use key, it will teleport you. As for daily specific items, I would just say do dailies. The higher the level of daily, the better the reward.

So no one cries any further I'll put this up for a short while then be deleting it.

If its not in this list, it doesn't exist.
rezozplace.com/highscores/itemlistunlocked.php

some items you have to be given and are not normally available, such as, the Yoshi skin or the Annabelle shotgun that only few people have from events or other reasons >:) hehe. I think there was also a secret rifle awhile back that was epic, dunno where it is now.