Do you mean electronic components or solder ?
For components I have to admit that its impossible to track how and where they were produced.
For solder we are currently using a tin based product from Alpha Metals.
We working on a DIY foundry for now. We think about recycle aluminium and make cube ready for a CNC. It can be a perfect "fair" way for metal component. But we need lot of test (temperature, solidity etc..)
We received in june a machine to recycle plastic to make our own filament for 3d printing. So also a way for plastic part on the camera or prototype !