If the THR members' business represent such a small percentage of your business, why not focus on your higher priority larger customers and let the smaller operators meet our "small fish" needs.
If many larger casters closed, perhaps, the added demand for hard cast bullets will keep the remaining small casters alive and keep them from going bankrupt.
I came to THR because many quality posters here have helped me from making mistakes they made while reloading and I intent to pass along information that might help others.
Solution to your THR member issues is quite simple. Focus on meeting your high priority larger customers needs first now. When you are able to provide smaller bullet orders (1000-5000) in a timely manner, set a reasonable delivery time frame on your website and offer a money-back guarantee/payment after delivery option to your customers. If you meet your published delivery performance promise, I am sure those experiences will be posted here on THR.
I believe in fairness and consumer protection.