think you are going to have a hard time getting that species specific with a dwarf octo, unless you go collect it yourself...and the Phillipines are not a safe place to be at the moment...
Your best bet would be to go to every lfs that sells live rock, and leave a photo with your number on it...that way, if they get in any Phillipino rock, and there is a dwarf octo hitching a ride, they could give you a call.
we used to just leave the octos in the reef tanks, but then cephophiles started leaving phone numbers, and would drop everything to come down and grab them.
good luck!!!
greg