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I had this problem with my previous boat. I solved it by fitting an A-frame. This device is very commonly used by Broads boats and it works quite well. I made mine from two aluminium poles joined at the top with two flat steel strips joined to the poles with U-bolts. I fitted a simple pulley system which gave some additional mechanical advantage when raising the mast. The mast was then lowered and raised by connecting the bottom of the forestay to the A-frame and pulling the rope through the pulleys. As the mast lowers, the end of the A-frame goes up and maintains a triangle of ropes allowing you to easily raise or lower the mast. Have a look at any yacht adapted for the Broads and you will see this arrangement.
I hope this helps. I can probably find a photograph if you need it.
Before my prelude, I had a Seahawk 17. I had no mast lowering mechanism but did find that I needed a tabernacle to stop the mast swinging sideways as I lowered it. I was able to unshackle the forestay and lower the mast by the forestay. I would have thought that a Foxcub would have a similar size mast.
A bad day on the water is better than a good day in the office.