I don't know the part number but if you want to have a key cut for a spare just take the insert key to any place that cuts keys and they can cut you a key on a standard Toyota blank.
I just purchased a new smart key from Conicelli, and it came without the metal key--which surprised me. So now I need to find a key blank.
that is part number 69515-47010 courtesy carlk Here's some information from the database on the Yahoo Prius Group site: 69515-47010 2004 Driver's door key $3.97 Conicelli Toyota - PA Tom Rielli - 800-825-7128 ext.2653 Mention you are a Prius Club Member for this discounted price Edit Delete 89071-47180 2004 keyfob WITHOUT Smart Start & Entry $144.17 Conicelli Toyota - PA Tom Rielli - 800-825-7128 ext.2653 Mention you are a Prius Club Member for this discounted price. List $192.33 Edit Delete 89904-47061 2004 keyfob WITH Smart Start & Entry $160.50 Conicelli Toyota - PA Tom Rielli - 800-825-7128 ext.2653 Mention you are a Prius Club Member for this discounted price. List $214.00