Search arborist Throwline. Comes in different materials that should suit and is a lightweight small diameter cord that you should get in 50m lengths. Just a thought though, food dye , my friend that I gave a pink dyneema sling dyed his a dark purple and added bright green cotton strands to contrast. Looked mint

Mersa, thanks for the suggestion, I looked it up on amazon, they have a few colors, light green, yellow, and blue, a bit too saturated for my tastes, but a good suggestion.

Morphy, I’m not exactly sure the exact diameter I would like, but when I braid with it I’d like a 6 strand flat braid to be about as wide as 1 cord of 550 paracord (if that helps at all ) The Kevlar I use is great, but I think it’s a bit thin, so, like I said I’m not sure what size I want. It’s just the colored one so have seen have been very thick. Oh, and I’d like it to be twisted, not braided.

Maybe look at hollow braid dyneema ropes . This will be expensive but very thick rope. You can cut it and pull out all the fibers and start fresh. Might be the easiest way to get fibers instead of cord

You can buy sportcord. It’s paracord but only about as thick as masons line or butchers twine. Comes in all the colors paracord does and comes from the same websites/suppliers. You can gut it too

second: sport paracord...

Try rope manufactures such as Marlow , Yale , New England , teufleburger , Samson . One of those brands should get you where you want to be. But sport cord is likely to be a nylon or poly of some type . Not really Kevlar like

Thanks for all the help guys, I’m thinking Dacron might be the way to go for me now. Think this is thick enough for my desired result of paracord thickness on a flat braid?: https://www.amazon.com/gp/aw/d/B000LC8144/ref=mp_s_a_1_2?ie=UTF8&qid=1520375162&... If so, now I just need to decide which color I want to get first to make a test sling out of before investing in a bunch more colors.