I think maybe the inventory would help with this. You can input the unit price into a list of inventory and pull these into the purchase orders through a search. There’s more information on this here: Purchase orders
Unfortunately not, but you may wish to add your vote to this request thread: Integrating with a Stock Control system
It is limited to a maximum of 50 to a page, but you should be able to move between the pages without any issue. Are you experiencing an issue with this, or is it just the 50 limit that’s an issue?