My name is Mayu Ueda and I work as a sales representative at Marubeni Tetsugen Co., Ltd.
I'm writing this message to know if you purchase activated carbon for gold recovery.
Although It was a long time ago, we delivered 1-2 containers of activated carbon per quarter to your for gold recovery in around 1992. 
If you are still purchasing activated carbon, we would like you to consider purchasing activated carbon we export from the Philippines.
If you are interested, please contact us.