Missed it on the web, but called and ordered one that way.
I also, for insurance, picked one up at the store, but I forgot :I that the serial number was on the outside, and so only noticed it was an Acer when I got home. D'oh!
So I called back, and they said they had several left with the 12-digit, purely numeric serial (Lite-On). I requested that they hold two of them, and then drove down. It turns out they were the less price-appealing 32X burners that they held, but since it was their mistake, they gave me the 24X price! :^) No coupons, but still a good deal.
Remember: you can call the local OM and ask if any of the 24X drives have a 12-digit serial, and then request that they hold one. Save yourself some time.