Viet Hoa Food Market has it. It's on Preston Hwy on the right, past Fern Valley going south.
I went there today looking for squid ink. I hadn't been in there for quite some time and the place has taken a change for the better since my last visit. They have an unparalleled seafood selection both frozen and sort of "fresh" and a lot of other neat stuff. There is a huge language barrier though, so it helps to have an idea of what your looking for.