I can help you.
I already work in garment outsourcing projects (high end evening dresses, high end casual clothes, pure pashmina stoles) from India these days.
I also have contacts in China but I don't recommend you because you are looking for high end.
The problem in outsourcing clothing from Asia, is that foreigner struggle to find the manufacturer and always ended up with trading companies which don't have the best price quality ratio. And even don't know what they are doing. Especially knowing the raw materials differences used to manufacture and knowing the finish of manufacturing.
The most important thing is to find the right manufacturer, who already work high end products in your category of clothing. We work with more than one manufacturer, give our custom made designs (pach teck if available will make it easier), assess the quality of manufacturing of the targeted manufacturer by checking his already made designs. Ask for samples of your custom designs... ......