I received today knobs from Thonk (via Postmail).
If your order is ≤20€, no tax from UK. But (not sure) the limit will be ≤50€ in July.

In Belgium the threshold for customs charges will be €0 unfortunately. But I can also ship to friends in the Netherlands, thanks for the inspiration!

Banzai looks cool. Not so many options for different shafts, but there might be something useful in there!