I can't tell from reading this discussion what's really needed, but I'll throw this out there any way. I buy my interfacing from
https://www.fashionsewingsupply.com/. It's more expensive, but it's nice woven interfacing in many different weights, both fusible and sew-in. Since I don't use a lot, the extra cost doesn't amount to much.
The website is a little confusing, trying to figure out where "shirt-crisp" fits in to "lightly crisp" and "super-crisp" and the ones that don't say "crisp" at all, but the products themselves seem good. I would probably order their sampler next time before ordering more, just to lesson the confusion.