I bought an 08 CRD Overland recently with only one remote, bought a couple off EBay from vendor "yourkeylessremote", sells them for $44 each with free shipping. Definitely cheaper than the dealer, and supposedly if you have two working remotes, you can program a third yourself (but that won't help ya)...the dealer charge is high-$100 or so to program. If you know anyone at any dealership, the job can be done with a scanner. That's what I did, he had me park outside the fence but still in range of the wireless scanner-snuck out on his lunch hour to do it!
2008 Grand Cherokee CRD Overland 2WD, GDE Eco tune with DPF delete, MBRP DPF back exhaust system