.... that you put too much emphasis on the submissive nature of the partner in life you are looking for. Not that I would not agree that it is a pre-requisite for who you are looking for. It just narrows down the "choices" available to you too much at the outset, thereby automatically excluding those who may not be aware of their underlying submissive nature, predilection, whatever.
So, my advice - for what it's worth - would be: seek out prospective partners by being more broad in terms of what you expect, e.g. rather than saying she has to be submissive, try willing to experiment sexually.
Maybe I am reading you completely wrong, but that is what came to my mind.
SMartie
PS. By the way, best of luck in your search