If you can find a copy of Airways from July 1998 there is an article with photos. Reg. of DC-3 on floats is N130Q. At the time it was owned by a guy named Max Folsom and was based out of Greenville Maine. It was at the time, the only DC-3 on floats.
Article goes on to state that the USAAF ordered 150 sets of Edo 78-29,400 floats for C-47's so I am sure there are military photos somewhere as well. Eventually only 30 sets of floats were manufactured and not all were installed. Designation of C-47 on floats was C-47C.
N130Q was originally a C-53D Skytrooper USAAF serial No. 42-68834 Manuf. Ser No. 11761. It was delivered to the USAAF in October 1943, acquired by eastern Airlines in November 1945, modified to DC-3 standards and registered NC86562. It stayed with Eastern till 1952.
I am pretty sure that I read somewhere that this aircraft has since been sold but I can't remember any of the details.
Hope this helps.