Denso 234 5052 O2 Oxygen Air Fuel Ratio Sensor Honda Acura 5 Wire 02 Sensor | eBay
is the same sensor as my brother just bought for his VX and even tho it's sold in a Denso brand parts box, the o2 sensor is an NTK brand part because the civic VX is pretty much the only car that takes that exact sensor.
Walker O2 Oxygen Sensor Pre 92 95 Honda Civic VX 1 5L | eBay
is half the price and they say it's the right part but I suspect it's not going to be an NTK made part so you have to figure out if you want to risk having to buy a 2nd one if this half price one fails.