I'm paranoid about losing a key and not having a replacement. So, first I called Bobs and got the price from them, then I visited my local hardware store, which I think is the best hardware store in the universe. The store owner tried several blanks and, voila, found one that fits perfectly. I'm sure any good key shop can get these blanks. He made me three new keys at 95 cents each.
You can get them from Bob's BMW at $11.00 each, or:
Go to your local locksmith and get an ilco key blank #vo6 for 95 cents