I don't entirely understand what are you asking for, that's the issue. In summary what I understand is:
"I want the ability to add the generated actor immediately to party, instead of running a script call or manually checking variables".
If it's just that, you don't need to comission it, I can just make an update, no need to pay, to both plugins to add a parameter.
If what you want is to place the generated actor in one specific spot in party, it might take a bit more of work which would require a later update or a commission (since it's not visual, I wouldn't ask for so much either!), since I would have to make a not so generic plugin, being your choice if to make it "replace" the actor sitting there, or move the later one spot later.
But I'm not 100% certain if adding the actor directly to party with the plugin command is what you are asking for, I just wanted to make sure, before starting to work in one direction or another!