Key fob go to Harry's Key Service on 117th. Specifically the 117th location does vehicle fobs, others do not. They've got high tech machines that copy the key part flawlessly. They have several very kind and informative employees.
It turns out, the key copying is only part of the trick for the key fobs, as (at least my) cars have a radio sensor on the ignition that checks if the fob part is approved (programmed). If the key part matches for my car, it'll turn radio on but won't kick ignition over unless the fob part is programmed. In my car's case this was a set of steps such as insert old key, turn on for some seconds, turn off, insert new key, turn on off several times, then it programs it in the car.
The people at Henry's explained all of this to me made it very clear that I am welcome to Google and try and do the fob programming myself to save money, or they can try it, or they can order a fob that's more reliable than the flimsy Amazon fob, and if none of those work it'll take an actual dealership unfortunately to get the thing to program.
And, they have TONS of key designs to get inexpensive copies of your house keys!