54' Belair - RBS IFS or similar?

I saw the post with the guy using the RBS Obsolete MII IFS kit for air suspension.  I tried to find this RBS company and am coming up with dead links and no leads.  I am planning on bagging my 54' and liked the way the one shown turned out.  Does anyone know how to get this RBS kit now if available- or possible other options????  

    Thanks,
    Spaz