Having someone do it manually is the simplest thing that might work. Yes, it sounds tedious and time consuming. So let that person automate the task away. That

Having someone do it manually is the simplest thing that might work. Yes, it sounds tedious and time consuming. So let that person automate the task away. That means putting someone with the skill to automate the task away at the manual task. Custom underware is a sewing problem not a shopping problem. Good luck.