I potentially lost one of the two supplied key fobs. I was searching for a solution but couldn't come up with a clear one. Option 1 is to go to dealer for new key fobs but those are very expensive. Option 2 is buy something like this (USED 2011 FACTORY HYUNDAI SONATA REMOTE KEYLESS ENTRY FOB TRANSMITTER | eBay) and then program it myself (without having to disassemble the car), but I couldn't find any information about programming it. Thanks.