2007 3 door in Canada - different key for the hatch?

[Bluebaby]

I'm highly interested in an '07 3 door, the one bad thing is that the key I've taken test drives with doesn't turn the lock on the hatch, and penetrating oil in the cylinder has been unsuccessful so far.

Did these cars come with a separate key for the hatch, or might I be looking at replacing the lock cylinder? Anyone have experience with how much that might cost? Thanks in advance.

[WeeYari]

Same key. The bad news is these hatch cylinders are very, I mean very prone to tumblers seizing. Mine has been frozen for many years now.