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I've seen people recommend getting a locksmith to make you a key.
There's also the option of buying cylinders from somewhere like LMC Truck.
Edit: LMC for the door cylinders.
I found a local locksmith that will make a door key for $50. Sounds like a good deal to me. I don’t think a dealer would let you touch a new high tech $300 fob/lock/key for $50. +1 for low tech!