Inquiry about Miniature LED Wire Lights for Stage Costumes NEW

I am looking for a manufacturer for a custom order of miniature LED wire lights for stage costumes. Main order: 18 strings, each 20 meters long (total 360 meters), cool white light with a slight blue tint. The wire must be very thin and flexible, suitable for sewing onto fabric. Each string should have a small battery box with round button batteries and a tiny ON/OFF switch. The battery box should be approximately thumb-sized, preferably elongated. Additional order: 9 short strings, approximately 50 cm each, with the same LED color and similar miniature battery box if possible. Delivery of the complete order must be within 30 days. Please confirm if you can produce 20-meter battery-powered strings, supply the additional short strings, and provide details on wire diameter, LED size, LED spacing, battery box size and battery type. I also need real photos and a video of the lights switched on. Quote the price including shipping to Russia and advise production and guaranteed delivery time. Do not offer standard thick-wire outdoor Christmas lights. I specifically need very thin miniature LED wire for costumes.