www.sexplezier.nl
lists independents, a number of them in Amsterdam, and more than a few of them a bit scary. its a free straightforward site, and calls attention to reported "fakers", but also provides many links to somewhat dodgier sites.
(in Nederlandse)
we also have "kim" listed on our escorts page, under independents. she's been confirmed as an excellent provider by one of our members (search for the post here)