The cabin is looking good so far. The aircraft interior black is a nice color.
The 193d Aviation Company emblem isn't usually a patch. You probably won't find it as such. His unit shoulder patch would have been the 193d Infantry BDE patch that you have pictured above. The one with the bird is the unofficial company emblem that they would have had painted outside the unit areas and such. You may be able to find it on google as clipart or you could copy it if you can find it on something flat.