(1) I must have gotten mine from missions. I do not believe there is any "type" of mission that drops particular types of commodities but I have been running data & cargo delivery grinding FED and IMP rank, wound up with plenty.
(3) I went with the Charge Enhanced Power Distributor since I did not need "Focused" or "Shielded" power distribution and Charge Enhanced seems to offer nearly the same advantages of the High Charge Capacity mod but with lower negative values.
(5) If you plan to fight that ship you will probably, eventually want to upgrade the power-plant for increased capacity to run weapons. For fighting (heck, for about anything), IMO stick with A-rated for the thermal benefit and relative weight savings over "B" models.
(6) It's wreckage you're looking for so a Convoy USS isn't going to do it. I just target each USS I see as I fly along, as I am doing whatever it is I am doing and if it does not say "convoy" I drop in and take a quick scan. You will find them mixed in with other debris, usually only in ones and twos.
Thank you. Will give charge enhanced a shot. The python isn't meant for dedicated combat. The weapons are for dealing with one or two NPCs. If I am going to be doing serious combat, that is what the FDL is for. Powerplant choice should be just fine. 6A and will use the modification that I need. For now at least, low emission works great.