Get any high grade emissions, and trade the umpteen G5 mats down to Focus crystals.
This, I'm afraid.
If you're trying to find Encoded mat's you don't
need to think any further than "Farm Jameson crash site" and then visit trader.
There are definitely other ways to collect Encoded mat's but none of them are really necessary.
Similar thing with Manufactured mat's.
There are plenty of ways to collect them (combat, mission rewards, farming various surface POIs etc) but all you really
need to do is hoover up mat's at HGEs and then visit a trader.
Most curious thing is, having put these "short cuts" into the game, I wonder why FDev seem to have gone the
opposite way with Raw mat's, making them more difficult to locate than they used to be?
I wonder if they've deliberately chosen to make Raw mat's the "gatekeeper" for engineering, if they just haven't come up with a suitable sort cut yet or if there's some other reason?
The other thing is, since we now have a pool of around 80 Encoded and Manufactured mat's that can all be gathered from only
two sources, it's actually kind of contrived that we
have 80 different mat's at all.
A lot of time the only effect of these mat's is, literally, to force us to waste 10 minutes going to a trader to exchange what we have for what a mod' needs.
Back in the day, when certain mat's could
only be found from specific sources, it made sense.
You want, for example, G5 Thermal-resistant SBs?
You
have to go and explode some pirates to get the Exquisite Focus Crystals you need.
These days it's, basically, like living in a world where we all earn money in £Sterling (if we're in the UK) and then having shops that want paying in dollars, rubles, yen, zlotis, yuan, francs or groats, forcing us to go to a bank and exchange our £ for different currencies (losing some of our money as commission in the process) just so we can satisfy the whims of different retailers.