you could try this one:
http://www.datakits.co.uk/store/sony-psp...-4013.html
however i would email them and make sure that:
1. they ship to any country.
2. these are for the phat.
3. can be pandora modified.

or you can try this if you live in the usa:
http://www.divineo.com/cgi-bin/div-us/zz-psp-2600
true its not a genuine one but it comes recomended, however i don't know if it can be pandora-fied.

or this:
http://www.play.com/Games/PSP/4-/728137/...oduct.html
again check if you can get if you live in the us.