Such a shame. It's those darned synthetic leathers again, ruining an otherwise nice pair of shoes. I wonder if you could prep, then paint the interior with something tough, yet flexible, like silicone caulking, Lexel, or even silicone roof coating, to hold the interior surface together.
In addition to what Cali has said, if your calves are particularly large, that also limits your choices. For knee high and over-the-knee boots, you should look for the calf measurement on the product's web page. Some manufacturers make limited models of wide calf boots, but not many. I don't have that problem personally, but my wife does. If the wide calf offerings don't suit you and you're willing to spend a little more, there are places you can get a pair of boots custom made.