Best way to get planet specific legendary quality items?

Hey, I recently built space ships for legendary quality iron/copper/coal/calcite(=stone on Vulcanus).

The next step would be to get the planet specific items in legendary quality - what is the best/most efficient way to go here?

I started with uranium (for the portable fission reactor) and I'm not sure how to get legendary uranium in higher quantities. Right now I have centrifuges with quality modules (QM) and a recycler with QM behind them, which upcycles the uranium but it takes ages to gather just some legendaries.

Nauvis - Uranium, biter eggs, fish
Vulcanus - Tungsten
Fulgora - Holmium Plates
Gleba - Carbon fibre
Aquilo - Lithium plates

Thanks in advance.