lost my remote key

I have a 2005 Scudo and so far i seem to have lost the remote key. Do I have to pay the full whack to a Fiat dealer to get a new remote or is there a sneakier route?

Or would it be better/cheaper etc to buy a decent alarm with CRL and have a new key without the remote function. I have already replaced the door locks with steel barrels, so having a spare ignition key would be good, but not necessarily the full remote key.