Pishaw - of course Kaiapoi had its own newspapers, The Kaiapoi Record for one and other papers that covered North Canterbury (The Rangiora Standard, The NC Guardian, The Oxford and Cust Observer, The Recorder and The NC Gazette). Nowadays the region is served by the Northern Outlock and the NC News.
My mother wrote the history of Kaiapoi, and she says even finding paper copies of these are difficult. They are split between the Canterbury, Kaiapoi and Rangiora Museums, the Christchurch City and Waimakariri District libraries and private collections. Unfortunately none of these are on line, nor does there seem to be any great drive to put them up.