Light use just a few I would go with something home made. Drilled out nut. Advantage of a ring sizer is much easier to make, look at Mec 600 presses, ring sizes. Proper tapered die is a job for a good machinist. Over my head.

Good thing to have is a plug expander also home made. Not all brass problems are cured sizing outside. Easy to make out of a bolt.

Use Imperial sizing wax makes things easy.

Long term lot of work buy proper dies

Boats