How can I arrange Express Replacement Service online iPhone 4

Hi, all -

I have an iPhone 4 that I dropped (hard) on a tile floor. Back screen shattered, but phone still worked okay. Now, the wake/sleep button stops working intermittently. Point is, it's my fault, I broke it, and it's out of warranty anyway. I'd like to pay for an express replacement (I understand I can pay $100 or $149 or thereabouts, and Apple will exchange for a refurb; they send, charge me a deposit, then credit back the difference when I ship mine back to them). I can go to the Apple store if necessary, but would prefer to do this online (the instructions for ERS refer to the capability to arrange it online). I cannot, for the life of me, figure out how to do this online. I log into the online service advisor, and it only gives me the option of sending my phone in for paid repairs.

Is there a way to set this up online? (I would prefer online than having to call them, I'm antisocial that way! ) I appreciate any info.

thanks,

Christina