Shipping Option and inventory management

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Greetings to all,

I wanted to know about Selling worldwide except U.S.A. I have vendor in US who only shipped to US only. So, I reached to others and they are doing worldwide shipping, but i don't want to loose this old supplier of mine. So, I was thinking if I can make changes on my store. For example, If U.S.A customer search for product then whole inventory can be showed but if someone from outside search for product then the supplier with only US inventory would be unavailable to that persone.

Please let me know if any app or if Shopify has inbuilt solution to this question.

Thank You