Tried the local hardware store, tried Home Depot.... both said "Sure, we'll duplicate a key onto those... but you have to pay us to program the transponder.".... and that's beeeeg bucks.... like fifty dollars per key.
I have a non-transponder copy of the key that could be sacrificed if needs be and I can handle the transponder myself.
Bottom Line: Unless I can find a compliant locksmith, it seems like I'm down to duplicating the keys myself.
Has anybody tried this?
For doing it without a specialized device, it seems like the critical part would be tracing the precise outline of the known-good key onto the blank..... after that I would think it a matter of enough care and the proper Dremel wheel or cutter.
Or might there be something at Harbor Freight to help with this? Seems like a pretty simple device would do the trick - albeit slowly.
Googling returns lots of devices - some of them pretty cheap... but I would be looking for one that somebody has actually used successfully.