Last 3 all correct!
Custoca, of course, is also known as "Custoka," but either would be OK.
It occurred to me last night what I probably should have used for #10: NJ. Oh, well, it would have had the same issues as the Excalibur J anyway. It would have been a repost, and it would have slightly violated a (heretofore unstated) part of my theme: one-word, non-acronym names.
Just four to go, including the two I've been expecting to be the hardest.