W/ Brackets are reffered to as VESA standard.
If you google VESA you get a host of Co's selling VESA 50 / 75 / 100 /200.
These numbers refer to different sizes. Best tilting VESA domestic item has a 17 degree angle pitch.
45 degrees is a pretty silly angle for a screen, for viewing and also for the weight / gravity pull.
I've found one that will do 45 deg but only up to 37"- Its £345 !!
http://www.theplasmacentre.com/prod...d&shopsessid=283038783ccfd780b6e0221a87469507
E-Vision Spec M6 swing arm premium LCD Wall Mount Bracket.
This is part of our premium range of brackets and is a stunning stylish bracket that is as good to look at as it is to hold your TV on the wall!
Made from machined aluminium with cable management system
- holds up to max weight 25kg, 680mm reach
- twin left right pivot
- provides full movement - 180 degree left and right and 45 degree tilt
- horizontal "Adjust and Lock" mechanism
- comes with standard 100 and 200 VESA fitting plate
- on request - 200x100 VESA fixing plate
- or 120x180 JVC fixing plate
- or Standard H Frame
- or Panasonic H Frame
- or Bang & Olufsen adaptor fixing for Beovision 6 22in and 26in LCD
- adaptor plates available to suit all manufacturers of LCD TVs
- holds 26" to 37" LCD screens
- wall to back of screen 150mm when folded back