Check the service book & owners manual for its key number - or send your VIN to Volvo Sweden who will give you the key number that an Oz locksmith will charge over $100 to laser cut. Might be worth asking if they will either cut key(s) for you or send (a) blank(s).
I just had a Wagga locksmith laser cut an 850 ignition key for $135.
If you want his details pm me.
Good luck
Tiny