I will be releasing a patch on Monday that fixes this (and many other) bugs. You have to talk to the fence at the raccoon hideout to get the TF.
Right now the only way in is to brute force the secret code. In the Sciawin Estate, you can find a hallway which has a set of six candleabras. Examine them in order 313412 to open the secret door.
I will be adding some NPCs and ways to find the password in the next version but I'm not going to make you wait.