Growing your business to keep up with demand isn’t an option? When I scale up, I plan on setting up a sewing room and hiring a few folks to help out. I loathe having any outside place doing my production, I don’t trust they would do as well if I wasn’t local to QA everything l.
Sorry to hear you are going through this. This is the biggest fear all of us in micro-manufacturing have - not being able to watch the quality of the production once we grow and sub it out. When I do scale to where someone other than I do the sewing, it will be local so I can do QA regularly.
Its not easy - get inventory made between now and spring, then find an arts & crafts faire nearby and get a booth - that will give you an idea of how sellable your items are.
Started in the “spare” room, moved to the front room, then finally into a 12’x20’ shed/workshop in the backyard. We are on an acre in unincorporated LA County.