Thanks, everyone. I do appreciate your help, and willingness to do so.
I called a dealer, and he immediately asked me which way the key "stepped", whether right or left. I was confused, and he (more or less) patiently led me through what that means. My key is a step-left (apparently, a step DOWN on the left side of the key), according to this man, meaning that it is a type 2 key blank that I need to order.
Thanks for clearing up the "type" mystery. I have a second OEM key somewhere, but I haven't seen it in a while.
I use my OEM key and have a working non-oem key in my motorcycle jacket pocket (always take two keys with you :-) ) ...
but I'll order one of those OEM blanks...
-Mike