buy Paper Cardboard

We are a well-established paper packaging box supplier in Taiwan and would like to buy (SBS) 270/300 gsm Duplex Paper Cardboard with white back IN SHEETS from New Zealand. Our estimate order quantities:
1. 270 G (23.86" x 32.80"): 515 REAMS/Month
2. 300 G (28.75" X 28.0"):1,373 REAMS/Month.
Any New Zealand manufacturer/supplier interested, please quote your best price CIF KEELUNG, TAIWAN. Looking forward to a good business with you and hearing from you soonest.