It would be nice to see one of those, although to be honest you can make a decent proxy with some different sized pieces of plastic rod. I made a couple for ny 198os Berlin Brigade, as they continued in service there, due to perceived issues with using the M47 Dragon in an urban envionment.
US Army engineers continued to use them as did the Rangers, right through to the 1990s. The Rangers eventually replaced them with the 84mm Carl Gustav.
In Vietnam they were generally considered too heavy and were usually allocated as base defence weapons. Even the Australian Army used a few, temporarily replacing the 84mm Carl Gustav (political issues with Sweden). They were only taken out when expecting a bunker assault. I think we handed them back to the US at the end of the war, they certainly didn't serve beyond it, as the 84 was a better weapon.