I'm willing to sell em for 2 btc each (that includes shipping) for steel cable (the one pictured is 3/32" galvanized). I only have black paracord at the moment, but I could do those as well (I'll go and make one, and update this thread with pictures). The ends are dipped in clear epoxy to prevent chafing/fraying. I also have a some 1/16" galvinized as well (better for the ladies). I figured if there is enough demand, I'll go ahead and upgrade the materials to stainless steel cable.
** I should probably specify that this is a single knot, or piece of cable that's been tied into a knot. This cable is approximately 8 feet long, and due to it being steel and all, has a capacity of 230 lbs (120 lbs for the 1/16" cable) for a single strand. That means that if it gets snagged on something, you are going to probably break before it does. Don't wear it around heavy machinery, etc. Also, you can untie it into a single piece of 8' cable or rope, if needed.
Here are some pictures:
3/32" Galvanized Cable (3 strand x 5 weaves)
3/32" Galvanized Cable (3 strand x 5 weaves)
Black Para-Cord (3 strand x 8 weaves)
You can send me the dimensions you'd like, the thickness you'd like, and I'll make em up for you!