One of the guys here sent me a patch awhile ago which helped. Sorry I don't actually have it, but if you hold on hopefully whoever it was will check this topic!
Use the moving floors to get to the NE (I think)part of the building. There's a place where 3 bits of floor all go in the same direction. Down 1 of them is a body with a key.
I bet your Mum or Dad would give you it, in return for doing some household chore that they hate. Maybe offer to do the washing up for a month or something.