Any suggestions on how to make some pontoon wagons for Risorgimento/1866 Austrian Army? I'm using Napoleonic French limbers for the Austrian artillery teams so would press those into use for the front of the pontoon trailers, and if there isn't anything suitable for the trailer itself I guess I'd have to cannibalise some limbers and just glue the wheels straight onto some pontoons and pretend.  

Perhaps EQU11 Ox wagons and ask for horses instead of oxen ?