There were only dozen or so different keys, Mark, but
the odds on you finding one in a junkyard that fits are
rare. I'd go the socket arrangement. I had to do it once
a decade ago and it worked. Once off, you can get a
complete set with key if you want to. I forget what size
socket. It will either go on or it won't. Don't worry
about saving the lugnut. You won't... and you still
won't have a key anyway.

Best bet, get them off and toss them. Get a set of
regular lugnuts and don't bother with the keys. I've
never heard of anyone stealing Fiero rims and tires,
unless they were real expensive after-market rims.

But if you still want the keyed lugnuts, you can get a
set at
the Fiero Factory (Alabama),
Kick Hill Farm (Connecticut), probably
the Fiero Store, (also Connecticut)
and I probably have a set out in my garage.

I'd be more likely not use an impact tool. Use a
half-inch breaker bar or big ratchet instead. You have a
better sense of feel about when the nut will break free.

If you need addresses for any of the above enterprises,
let me know.

Fred

BTW - good luck with the car. Still fun to drive after
all these years.

You have a dealer that is feeding you a load of crap.

The lug nut keys (I think that the Fiero only uses ones from the first box
of 6) were used on a number of cars, so a dealer could not afford to not buy
a $10 replacement if they lost one.

The dealer can also get the code for yours by calling GM with the VIN number
of your car.

There are some dealers that really do not want to deal with old cars and
will make up excuses.