I haven't done this for a long time but I think you can create a template document in word with placeholders for the fields? Would that solve your problem?
I think it would if I was using the same fields, but I just inherited a db via the cloud that I am experimenting on what fields will work best for my data retrieval, plus my main office keeps adding needed data. It is a pain inserting a field, click down arrow, click down arrow. etc.. I though that maybe Big Bill would have already thought of that and would have program Word so lets say hold shift and insert all the fields you wanted.
Maybe I need to put it on a wish list.
I probable should put this in a new thread, but, while I am at it the phone fields have input mask so when I mail merge they show up all the numbers together. 3535023263. How do I get around that. When I make my own db I use a text field so do not have that problem.