Today at a junk store I got an Acer 6311, what a delightful little keyboard!
It has the black "fake-Alps" clicky switched but they feel very good - light, high activation point, nice click.
And best of all, true ANSI layout with PS/2 connector.
I realize that these are really mechanical plungers and membranes, but Model M is membrane, too.
This keyboard deserves more respect than it gets, as far as I can tell from here. Heavy metal plate inside, too!