1/48 revetments

[Librarian]

Just a quick question. Come up blank on this one but has any company produced 1/48 revetments from the Vietnam War. I've seen them in 1/72. Otherwise, can anyone supply schematics of their design. They resemble longitudinal girders blocked in with concrete.

[rickshaw]

1/48 Vietnam war helicopter revetment - http://www.ebay.com.au/itm/VP425-1-48-Vietnam-Chopper-Revetment-Verlinden-Productions-/171069699081?pt=Model_Kit_US&hash=item27d48c7409