The A.II was the military version of the M.5L, and was designed to accommodate two people, though not in any great comfort: the pilot's seat was mounted on a bench, oriented fore-and-aft, and there was room on the bench behind his seat for someone else to sit, the whole arrangement being rather like two people on a motor-bike. It doubtless often was flown solo.
Here is a link to the build our Mr. Albatross mentioned above:
http://forum.ww1aircraftmodels.com/index.php?topic=2235.0The A.I is a separate aeroplane, with the Fokker designation M.8.
http://www.flightglobal.com/pdfarchive/view/1915/1915%20-%200999.htmlIt had a much wider fuselage, high-mounted wing, and accommodated two men side by side, with extensive cut-outs in the cockpit sides for better downward vision.
I am away from my books, and will check when I can, but I think the Compendium had both 1/72 and 1/48 drawings. In any case, 1/48 drawings convert to 1/72 by a 33% reduction in size.