KT3170 (DTMF to BCD Decoder)

DTMF TO BCD DECODER IC (KT3170)

...pls tell me where could i acquire this IC....or maybe replacement ICs.....its for my telephone controller proj!! in my country (Philippines), i think there are none of this!!!! Please i need the info ASAP bcoz its due Jan 31! Thank you so much for your time!!!

This is a Samsung-clone of original Mitel (today:Zarlink) MT8870.
**broken link removed**