Mushroom Man

I own a sentry 1900 fire safe box, it looks like this:
| Sentry® Safe | 1900 FIRE-SAFE® Security Chest

The problem is, I HAVE NO IDEA WHERE I PUT THE KEY. Ive been searching all over for the past few days and have some valuables i need to get out, very quick. It has a tubular lock so its a bitch to pick, there are no nearest locksmiths near my area and the closest one is charging too much, id be better off buying an new box. I COULD buy a pick lock on line for it for 80 bucks and then duplicate the sizings but thats like a final resort and more costly.

Im thinking I could just buy a whole new sentry safe (same model) and take the key from that, but would the key fit? Its not like a super high end safe so im thinking all locks would be there same therefore the keys would match up. Am I correct? Please help somebody