Yeah, that anker powercore+ is a good one. It comes with 90cm c to c. I guess that length might be good enough for you.Sub-$100 preferably but I am flexible.
That does look pretty good. Does it come with a USB C cord or do I need to buy one separately?
I bought the ravpower 20100+ & 3ft aukey c to c. It is $7 cheaper right now compared to powercore+. It used to be 47.99.