Great interview and awesome read.
The problem with Kirby and the Hanger Project is that Kirby keeps coming up with these things that I don't need but want.
Case in point, the $795 ice ball maker for drinks.
You are basically asking if a premade jacket can be taken apart and completely reconstructed to fit you.
The answer is yes, provided there is enough material. Forum member who is a tailor has done so by taking apart a TomFord suit.
But realistically, don't ever buy "GREAT DEAL" anything that don't fit up front. Because it well cost you an arm and a leg to make it fit, if that is even possible
These are nice.
I get mine from Amazon. Pedag makes a slightly higher quality full leather insole in many configurations. For example, there is a version with semi-rigid arch support which adds even more volume to fill out your larger sized shoes