So yea, just to share with you guys.. You can get it from Play-Asia. (Affiliate Links below, for those who wanna say thanks! ;) So shameful of me.. )
Bloodborne The Old Hunters Edition (Chinese & English Subs)
and for those looking for the Japan-Exclusive Limited Edition, which comes with the Old Hunters Edition as above, Guide Book & Mini-Soundtrack CD.
There won't be a problem using different region discs as all PlayStation 4 Consoles can play any Region discs. They are also having a sale for the US Region disc for the orignal game at US$25.99 if you prefer that.
I have purchased lots of games from them myself, so I can vouch that they are a reliable site. Have fun Monster-Hunting, friends!