Ostomy lingerie line requested United Kingdom

We are enquiring about a new clothing line for our business. We are looking for a supplier to understand our brand and work closely with us, to design a bespoke design for our customers. Our clothing must include a "kangaroo-like" internal pocket to secure a colostomy, ileostomy or urostomy bag safely.
A little about us - We are based in the UK, we sell Ostomy underwear, swimwear, and lingerie to patients who have either colostomy, ileostomy or urostomy condition. We are changing suppliers due to incorrect sizing, poor communication and poor quality.
Our main focus is to create a better relationship with our supplier to create a product which the customer will be pleased to receive.
We have a few questions for you, what's your MOQ? and do you allow custom designs?
Please check out our website and socials
https://whi******.co.uk/