I have an old A1 AJ400 alarm system fitted in my house and recently the siren box an the outside wall cam down in the gales. I cannot trace the company to find a replacement, the dummy boxes are either too slimline to house the equipment, now exposed to the weather, or they have a backplate which I don't want. Does anyone have a suggestion please? Either the company who took over A1, a new phone number for A1 or an alternative box with the wall fixing holes on the front. Thanks.