Sorry, no luck. Several choices to choose from in black 4, or 6 mm, various braid options too but he only sells by the reel.

I did a quick google for "Black rope" and "Black Shock cord" and found a ton of inexpensive options. Even ebay. Most is a tight braid but there are lots of ways to splice without a knot, depending on the material you go with.

With great power comes Awesome irresponsibility.