Ways to store your armor:
Stanley Case - These are used by many troopers. They are sturdy, have a built-in latch-lock while also having two other spots for common padlocks. Troopers can often fit two sets of armor in these depending on the kit.
http://www.homedepot.com/h_d1/N-5yc1v/R-202300294/h_d2/ProductDisplay?catalogId=10053&langId=-1&keyword=stanley+job+box&storeId=10051
$70 Estimated Cost
Wal-mart Foot Locker - Smaller than the Stanley case and not as heavy duty, but much more cost effective.
http://www.walmart.com/ip/Sterilite-92-Qt-Footlocker-Set-of-2/16415911
$39 (set of 2)
Travel Golf Bag Base - Sturdy case with more mobility. Its skinny nature makes it easier to fit in places (Can stand-up), but it is also longer than most other storage options. It's main benefit is better portability and cheaper to travel with on a plane.
http://www.sportsauthority.com/product/index.jsp?productId=11367803&cp=&sr=1&kw=golf+case&origkw=golf+case&parentPage=search
$119