US Military Shovel

My fathers been crazy about collecting military equipment lately(canteens, clothing, boots, furnace, backpack, p38s, etc) and I want to contribute to his collection. He is ex army and served his time back in the early 80s, and has mentioned a camping shovel that ties to the backpack. Can somebody show me what this shovel looks like? And better yet, where I could purchase it? Thanks in advance!

-I tried researching myself but I ran into a variety... just want to make sure I get the right one ;)

I think this is the shovel he would want, to go with the 80's set of equipment. Hayes Otoupalik in Missoula has them.