Of the first few entries, I can say yours is the closest to what I've asked for. It's a bit busy for my taste (specifically because this will be printed on thermal receipt paper every day, in black and white, with moderate accuracy) and so it might be a bit too detailed.
Perhaps if you could tidy it a bit it would be workable. My thought here is mainly that the elements of the hat and such would not be discernible in scaled-down form, and the lock itself might be more friendly with a single outline or by substitution to a keyhole shape instead.
Again, thank you for reading my post. It's nice to see it's been done.