Consolidate Multiple Records into a Single Drawloop Document

I currently have a batch job setup the automatically initiates a package and attaches a Drawloop document to multiple records that meet XXX criteria on the 10th day of each month. The process works well, but in turn, creates multiple documents on each record separately. As a result, staff members are forced to click into each record individually and print each document one-at-a-time.

With that said, is there a way to merge multiple records into a single, consolidate document? In other words, is there an out-of-box way, or a method that uses Apex Code that could merge separate draw loop documents from separate records into a single PDF document? The records are not related so that rules out using any kind of related list merge template in the doc itself.

I have played around with the "Mass Generation" feature, but that seems to still attach documents separately. I have also found this similar forum post from a few months back, but it doesn't look it was ever resolved with an answer:

https://community.nintex.com/t5/Nintex-for-Salesforce/One-Document-with-Mutiple-Records/m-p/93708?collapse_discussion=true&filter=location&location=forum-board:Nintex_for_Salesforce&q=multiple%20records&search_type=thread

Any help would be greatly appreciated - thanks!