Mike, find any wall wart that outputs 12-18 volts, ac or dc. If you do not use any/many AIU accessory relays set to stay on, you can get away with a 400ma capacity. If you can find a higher milliamp or amp rating, go for it.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .