I just used two of these (set comes with 4), one attached on either side of the hex tarp, just attached to the triangle d-ring that's already on the tarp.
http://www.batteryjunction.com/f9t4-...FUzZQgodhh0Arg (didn't buy them here, just the first ad I found with them)
Less than $10, pretty lightweight, and worked for a long time for me until I opted to go with dutchgear.
All kinds of options. Just avoid using paracord...it stretches too much to make it an effective ridgeline.