Adding my experience to this thread....
My recently-acquired 60 came with only one key. Went to my local dealer to order a new one. They were great when I needed an extra key for my 62 about two years ago. Looked up the receipt and it showed the cost was $16 all-in. They ordered and cut from my VIN.
Fast forward to this week. And they struggled mightily to find the proper blank to order. It was $20. And they wanted $10 to cut it.
Okay.
I need a key.
Well, they can't cut it. Can't determine the code from the VIN. They have a new cutting machine, which they can't guarantee will do old key blanks. They didn't think they could even do it with the door lock cylinder code. And they wanted an hour labor to R&R it while I waited in order to find out.
These guys were never what I would consider to be shining example of a T parts department (or service for that matter) but they're the closest to me, and I wanted to have the 60 there to check the cut.
Back to the drawing board. Fortunately, the one key works fine. Just a bit of slop.