Fax - 407-939-7111
I found this on allearsnet.com, I guess it's current. I have read that they are discouraging faxing requests anymore and prefer that you call CRO and ask them to note it on your reservation. I made my requests that way, and I know they're noted because when I got my confirmation they were there, and also when I called last week to make sure everything was in order, the CM read it back to me. No matter how you send it, they are only requests of course, no guarantees.
Enjoy your trip!