I'm not surprised you haven't heard back from the Webmaster -- they are
generally busy and there's not much incentive for them to answer your
If I were you I would go with ArcadeTown.com
-- because since they provide free games -- that would be the easiest
way to get games on your website at no cost to you.
With respect to other (especially popular or well-known) games -- it is
extremely unlikely that they would allow use of their games on other
people's web sites without charging a license fee.
That said, it never hurts to ask -- and all at cost you is the time to
research who owns the copyright to these games and contact them.
Let me know if you need more input. If not, thanks for the
opportunity to assist you... I would really appreciate your honoring my
efforts by 'pushing the button' and Accepting this answer.