Closest thing I can think of is the guild armor. Doesn't seem to be based 100% on a game armor, unless it's something from Frontiers I don't know about.
I've so been DARING to get this one!! I'm already Rank-3 now about to go to Rank-4 (God I hate Tigrex, but even past him now, the other bosses are HUGE! Currently duking down with Diablos now and already lost once), but I can't find out how to unlock it. I've also aimed on the 2nd blue armor shown here (the asian-style one). Think you boys can help a girl out? Please fill me in on info if you get it.