Most of the MACRs are available online at footnote.com, unfortunately not for free. I would be happy to check out a few if we could narrow the possibilities down.
Here is a link for losses in Sept. 430906 in column 1 would be the day we want. The Location is were the plane was last seen, not necessarily were it crashed. When dealing with locations near country borders, this can be a problem. I would be happy to check out a few if we can narrow the losses down.
http://www.accident-report.com/MACR/1943/m194309.html
Here is another link which can get the pilot's name, which can help in on-line searches.
http://www.aviationarchaeology.com/s.../43SepMACR.htm