Find some heavy duty self adhesive sail cloth tape. Cut two 10cm (4 inch) rounds per guy out, with a hole in the middle of ONE patch.
Make a new guy out from two pieces of grosgrain webbing as shown. The safety pin is temporary to hold the grosgrain in position. Not shown here is a little zig-zag sewing over the grosgrain where it attaches to the cloth tape. Cut out the original tie-out leaving a small hole to match the hole in your second piece of repair cloth.
Insert the grosgrain through the cuben hole from the inside, pressing the cloth tape firmly.
Now you can place the second circle of cloth tape on the outside, with the the grosgrain pushing through the hole. Press firmly and you are done. When adding guy lines, make sure they go through both pieces of grosgrain to distribute the load as evenly as possible.