Thanks for the responses mga sir.

Just an update, I have opted to keep my current ride (Astina) and cancel the search for these cars.

I've been informed by a shop owner that a new batch of Z-series (Mazda 3) engines came in and he's offering introductory prices for the first few customers including me.

The engine is supposedly Honda's D15B counterpart.

Although I have realized I never want to go back to the ESi again.