A dealer is supposed to know better about how the keys work and give
you the two required keys.  They can't claim ignorance and make it
stick, but you might have to make the General Manager or Owner waste
an afternoon in Small Claims Court and a few minutes getting slapped
around by the Judge to get that message across.  ;-P

 I strongly suggest that you bite the bullet and have a locksmith
make you a few copies of the transponder key, then stick one of those
'master' keys in a bank safe-deposit box or a home safe along with the
vehicle's Title Slip.  Somewhere it won't get lost.  Because if you
lose that last key before getting a backup made, you're in a Heap O'
Trouble.

 No rules against calling around to local locksmiths and checking
prices.  There are several ways to lower the price a little:  You
drive there (don't make them come to you), you can take the steering
column covers or the door panels apart in advance and put them back
together when done (if needed) so the locksmith just has to do his
thing and be done.  Do it in the middle of the week when things are
slow.  Bring a Six-Pack of the locksmith's favorite beverage as a
peace offering...

 And if you tape the key inside the column you just made it
blindingly simple to steal the car.  They either punch the ignition
lock and it starts (because you've disabled the system), or they
figure out what you did and retrieve the key with a simple
screwdriver.

 (If the car is stolen and recovered, and their claims adjuster can't
find any signs of forced entry, your insurance company is going to be
very suspicious...)

 Be very lucky it's a simple transponder key and not one of the more
elaborate electronic key security systems that costs you between
$1,000 - $2,000 (and a few days delay with the car out of service) to
get rekeyed and the security computer reprogrammed.

    --<< Bruce >>--