Tent guy-rope tensioners (Barlborough S43)

The little plastic or metal widgets, often a strip with 3 holes in, so you can adjust the guy ropes. Got a protest banner [against Clowne so-called Garden Village] in our front garden and hoping to make it more stable as the winds get up. Can collect Barlborough/Clowne/Killamarsh/Westfield or Page Hall areas, or send an SAE. Thank you.