Old Navy Tee Block Condensed Font

Classification: 

Trying to find the Block Condensed font used on this Old Navy TShirt.
I've found plenty of close matches but not the exact font. I'm guessing this font has been rounded so I've taken that into account. Thanks for any suggestions.

Comments

B-52 is very similar (minus the rounded edges):

http://www.myfonts.com/fonts/stockbucket/b-52/

Closest I was able to come to letter forms and width to height ratio is Prohibition http://www.myfonts.com/fonts/hold-fast-foundry/prohibition/
This might be a proprietary alphabet.
Don