I do this via a product partition report. I pull Campaign ID, ProductGroup, CpcBid, Id, and AdGroupId.
If you look in the product group column, you can get your PLA IDs, just have to string replace the * / item id=", and other " with nothing.
If you want to assign bids you will need your criterion ID, campaignID, adgroupID, and PLAID in order to determine which exact item you are pushing a bid onto. (if your products appear in more than one campaign/adgroup/product group).