As you’re asking on Twitter you’re looking for tungsten manufacturers. Most possibly you’ve already found this one, but nevertheless I’m posting it here: “China Tungsten”
For their pure tungsten portfolio look at: http://www.tungsten.com.cn/
Maybe a crucible comes close: http://www.tungsten.com.cn/tungsten-crucible.html
As they’re not offering exactly what you want, ask them directly: sales@chinatungsten.com
They’re also offering a design service (might be okay for pure tungsten too): http://www.chinatungsten.com/designing_carbides_alloys.htm
