Not me, but...
One of my boat's previous owners did. It was two galvanized pipes, one inside the other, with galvanized eye bolts on opposite sides at one end, offset 2" along the length. The larger pipe was 1 1/2" diameter; the whole thing weighed about 60 lbs and I was glad to pay Hunter $56 to make me a proper one. It's aluminium, 1" diameter, and weighs about 2 lbs. It has a 6" stainless cable with crimped and thimbled loops at both ends running through a hole at one end of the pipe. The hole has a nylon bushing to protect the cable from chafe. The opposite end of the pipe has a scalloped cut to fit around the groove channel in the mast. (If you make one, make sure the scalloped cut is aligned with the hole for the cable.) It seemed a little undersized when I first got it, and it bends slightly under tension, but I've used it several times with no problems. Other than the eye splices in the cable loops, it would be straightforward to make one with off-the-shelf tools and supplies. Hunter doesn't stock them, but they made mine to order in less than a week.Hope this helps.