I used Walmart #: 552126019 but they were too long and the end would not fit in the tarp grommet so I ended up cutting a foot off from each section and machining a new end. Probably not an option for folks who do not own a machine shop.As it ended up it worked out well because I attached the new end with a small eye bolt which permitted me to run the guy lines through the eye bolt and over the top of the tarp so that it could not blow off.

At this point I will not even be able to field test it because my daughter, son in law and grandkids borrowed my truck mattress, my two burner stove, water jug, coffee pot etc so that they could go camping on an extended trip out west. Maybe they thought that we are even because they parked their 20 ft trailer in my yard but my four cylinder Toyota cannot even move it.