Of the potential contenders that have OA goaltenders, I see Lalonde, Oster, Flores and Elliot, and you could likely ignore any potential deal for Elliot
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Of the others, if you're the team considering a swap, you'd have to ask yourself if Parsons is enough of an upgrade (or any upgrade at all for that matter) to warrant the trade + pick(s). Absolutely possible, and if I'm MM I'm all over that deal. Just not sure what the odds are when one considers what those three already bring to their respective teams. In any case, if Parsons keeps playing well, maybe there's some interest - especially if you consider that one of those teams is Niagara
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On the other hand, 10 years ago when Kitchener was selling, they actually went out of their way and spent picks to acquire an older goaltender in Jake Paterson. Not sure whether or not MM thinks in a similar way (i.e. aiming to maintain solid goaltending even if he decides to sell), but there is that.