[MgB2]

In Germany, you can get your tungsten at Smart Elements

[eps]

Way more expensive - 120 eur for 1 cm3 cube.

https://www.smart-elements.com/shop/tungsten-precision-densi...

[BoppreH]

If you are willing to sacrifice a little on the appearance they have 1kg tungsten "ingots" for 99€.

https://www.smart-elements.com/shop/tungsten-electrode-99-95...