cashmere sweaters

We are a cashmere company looking for a new manufacturing partner to help us produce our 100% cashmere sweaters in 3 styles. We are looking for intarsia knit capabilities. We are hoping to produce in upwards of 600 units each PO. If we send a tech pack and sample sweater, can you produce exactly? What is your timeline to produce a sample for our review?
We hope to have our product in the US by end of August or early September.
Do you use stock yarns, if so, what brands? We used UPW last year and have been looking at Moro yarns as well. Please let me know if you have either in stock yarns.