'Sleeptight' security system

Hi,

We have recently purchased a motorhome fitted with an expensive alarm / security system.  It has a sticker on the window with the name 'Sleeptight UK'.  We don't know how to work this alarm and have tried to find a manual online or contact the company.  The company does not seem to be contactable - the website is always down and the phone number is unobtainable so we assume that the company has gone out of business.  

What we really need is an instruction book or manual detailing how to use this system.  Does anyone have one that we could pay for a photocopy of?  or even just a brief description as to how to use it?