@ Daryl--You bet, glad to be able to help out. Just counted them out and they will be in the mail in the next hour or so.
@ Ben--Yes, I have a black 3mm line just lie triptease with the reflective tracer, the black color is a bit more subtle in the daytime though, still lights up great under your headlamp. Same tightly woven sheath over a poly core. I just sell it by the foot so you can get what you need rather than pre-packed footage like the triptease.
It's Here: http://arrowheadequipment.webs.com/apps/webstore/products/show/1415993
Middle of page 3 of the store.
We also do a guyline kit made from 450 pound tensile 1.75mm line that has prussic knots added for easy adjustment. This line will not stretch at all under load until you hit the max work load. The prussic's can be looped over your stakes or onto the corner tie outs of your shelter. Just slide the line though the prussic to take up the slack.
They are Here: http://arrowheadequipment.webs.com/apps/webstore/products/show/1203757