I was looking at some pictures of Belgian army trailers earlier this week, which are offered for sale at a reasonable price. I think Hanno posted a picture of one on the forum before, but I can't seem to find it now. Anyway, these trailers seem to be based on the British 10cwt design, or maybe even based on actual British trailers. In case these Belgian trailers are modified British trailers, than you could consider using the wheels, springs and axle you salvaged to turn one of those trailers back to ww2 spec.
Alex
