The last new set from Larsenal in 2014. No, they don't float but you can use them for your Kriegsmarine dioramas.

This set (No. AC 350182) contains nine Henschel 33 G-1 3 ton trucks that were used by the Wehrmacht during WWII. They come in 3 pieces each of a canvas covered version, an open bed version and a boxed version.

Listed for € 8.95 ($10.75 US) plus shipping in Europe, or € 7.46 ($9.00 US) plus postage for non-European modelers.