Ninja'd, lol.
HOW AM I SUPPOSED TO GET MODIFIED EMBEDDED FIRMWARE THERES NO DAMN WAY THE ONLY WAY 2 GET EM IS THROUGH MULTI CREW MISSIONS AND I DON'T HAVE ANY FRIENDS WHO PLAY THIS GAME PLEASE HELP!
Look at the above thread and do some searches for MEF on youtube as well. I recommend setting up an inexpensive small pad ship with some jump range. (DBX, DBS, or Cobra III) Try for 30Ly at least. It should be obvious, but make sure you've got an SRV. You don't have to go overboard on the build either. Some of the locations can be tricky to find landing sites because some of the bases are located in the side of craters. A Python for example could work, but you'll be landing a few Km away in some situations. A small ship will get you to within 1 Km most of the time. Also, don't just drive your SRV, learn to fly it.
I usually do a set of base runs 2x p/month. Since 3.0 dropped, I've yet to try a run, but I'm due. Pre 3.0, I was yielding about 40-60 of each p/set. However, Frontier did get into the darn things and screwed with them. (YEAH, THANKS A BUNCH SANDR

YA ...) So, who knows what the average current drop is today. I run enough of these bases to make it a 2 evening event. Cool down time is 7-10 days, which you can use for gathering other mats, scanning ships in SC, doing DWE scans, earning creds, or building things that don't require MEF.
I've never received MEF from Dav's data point, but that's probably just the RNG for me. It's worth a look...
Rooks o7