Admittedly, i don't have one of these, but if i were looking to store my photogear this is what i'd do.

Buy one of those smaller, inexpensive *locking* gun-safe/cabinet and retro-fit appropriate shelving. They're not heavy, are lockable and usually can be configured to have a filtered-air dehumidifier/circulation fan. I've seen them at Costco, Gander Mountain, Cabela's or similar places - though not sure if Calgary has these particular stores.

However, you could look in any large hunting/fishing retailer stores and i certain you'd find one there.