We need a solution to our daily multiple vendor ordering, does anyone know the best way to make this happen?

Every day we have 100's of orders, many are all items in stock, however others are not in stock and we have to do a "special order" to reship the next day.

However, netsuite produces a separate PO for each customer,   we don't need 100's of Purchase Orders each day,  we just need one for each vendor.

Is there a way to have all special orders done for the day that are to the same vendor consolidate to one purchase order?  I would like it so that the Sales Order is linked to the created PO.