Design Questions

Hello everyone! I have some questions about the whole design thing that I would like to know the answers too if anyone is kind enough to answer them, I'd appreciate the help! So, currently I want to have a specific hair from a specific character, as well as eyes etc etc... but it's my understanding that shop owners don't get the full profits of their items (my idea was to pay a good sum to have them custom made for me), I thought of auctions in this way, but they aren't a thing anymore. Now, what would be the best way for me to get these items (say I provide the characters, or what I'd like), would it be possible to: 1. Overpay someone? The point is to get something I'd wear everytime so I'd pay a good amount to make it worth their time, is this possible currently? (Boutiques for instance?) or not? 2. Design/crop them myself - If so, can I buy my own designs? or would a gift shop work for this (assuming I make the design?) It's a lot of questions so I appreciate anyone that might have the answers to them. Thank you kindly!