I have struggled to find a decent source of this in the past...

I have struggled to find a decent source of this in the past aswell. I've never really found a site I'm 100% happy with but here are a couple.

Here is a link that I have used previously, but I think the prices are quoted in Yuan.
http://www.dce.com.cn/portal/cate?cid=1114494099100

Here is another one, but it always seems to be a few days behind.
http://www.barchart.com/futures/commodities/ITI