What a wonderful thought thing to do for your daughters!
Here's an idea which you can feel free to dismiss if it seems to you just too dumb. I recently inherited a vintage ring of about 50-60 years old, an elaborate confection of 15 diamonds in bead-and-bright settings and in two colors of gold, designed to make mouths drop at the yacht club cocktail party. On a whim I entered a few descriptive terms into ebay and, lo and behold, someone was selling an antique ring identical to mine and at a fraction of its appraised value. If I had two daughters who wanted my ring I would have jumped at it. I believe that anything one wants will eventually show up on ebay, often multiple times. Assuming your ring was a mass-produced style and not custom-made, if you keep a watch on ebay who knows but that you might find two more copies if you give it a little time and patience. Just an idea to spare you the hassle and expense of trying to get three reproductions made.