Join the club of "It sucks to have cdma specific parts"
You can always try requesting one from your carrier but other than that,
AFAIK (unless you have a GSM model) you're SOL. :/
You'd think there'd be atleast one place that sells a general battery door for the CDMA models but were going on 6 months and still nothing.
P.S.
Seidio are you looking? Opportunity knocks...