mustang replacement molding question

No. However, you might start by going direct to suppliers and asking. On a number of items, I have done direct contact, stated my problem and asked if they have an alternative. I have had excellent feedback from every company I have contacted.

I'd be willing to pay a bit more for better material and fit. I'm suprised there's no other company out there making this stuff as they stand to make a lot of money if they could make a better product than Corvex.

If it were me, I'd contact people like Scott Drake, Mustangs Plus, etc, explain the problem and see what they say.

As for making a lot of money, that's a little off. How many classic Mustangs still exist which need that (or any) particular part? Some parts are more in need than others. And with the restomod movement, a lot of those parts are not needed anymore.

Now, with the new bodies (ie 67/68 FB) becoming available, some parts may increase in need, even as modern technology is installed.