I would second taking the Edeas with you, if the actual boot fits your feet. Everglides may well be able to shim the blade and alter the angle of the blade. It's just physics, after all.
Or you could try playing about with insoles to see if you can correct the pronation eg by cutting away the outside edge of your insole, or building up the inside, or both. Taking away insole would give more room inside the boot, and allow building up. It's a relatively cheap and quick experiment
I was in my late 30's when I corrected my feet.
Did you drill the pvc yourself? And did it last? i ask because a lot of people say you cant change the blades on pvc, and I have pvc soles. I suppose all your new holes were well away from the original holes?