(Purchase orders) Products and sites

(Purchase orders) Products and sites

I have two questions:
1) For now Products are linked to Vendors. I have multiple vendors that can ship same Product. Is there any way i can select Product regardless of Vendor?

2) There is no Site for purchase and i must manually put all the products to the specific Site "store" one by one. Can you add Site for purchase and automatically put all products to this Site after Purchase order is completed?

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