I would like to have a retractable screen door installed on my 2007 Roadtrek SS Agile (on a 2006 Sprinter chassis). I have checked with Sportsmobile and they only will work on their own products. Does anyone out there know 1) can a retractable screen be installed on a 2006 Sprinter sliding door and 2) who might be able to do this? Thanks in advance, Barb