Stop at Home Depot and get enuff 1/2 inch plastic water pipe and conectors to make it long enuff to reach up that high. A little duct tape and coat hanger should do it.
Don't use glue and you can take it apart when you are done.
Was out on my Rhodes 18 alone and when gusts became more than I wanted to handle, I lowered the main. Unfortunately, my halyard ran up to the top of the mast. Any suggestions for getting it down without having to lower and restep the mast?