p/n 60112035000 costing about £288 plus a mounting kit p/n 63512938044 at about £40. Manual.
You can make massive savings on the Meta DefComT alarm system by buying it from ebay at ridiculously low price. Just search for Meta DefComT. This is the exact same hardware, even the light in the dashboard works out of the box. The £40 mounting kit is not strictly necessary, as you can install everything with velcro. See this install report.