Need to buy used rails R 50, R 60 to China

I need to buy used rails R50 L = 60 cm or 80 cm / W= 31 kg and  R60 L= 60 cm or 80 cm / W= 38.83 kg
I need 7 to 12 MT.
50000MT ot 100000 MT pre shipment per vessel.
Shipoing to China.
I need 10 ton 18 vessels per year.
Wating your full data.