i want to buy bearings and 2 orings like the dragonfly has and nedz in usa. Im not sure what there even called cause they have like a inner tube that pops out a bit and touches the other bearings "tube" and the orings go in the middle of these. I hope someone knows what i mean ( if not look at one if you have a machine like this ).

where can i buy and what are they called ? inkmachines has them but there way to much money in shiping alone