Ask mapmakers for recommendations, I would suggest TJ13820, ahs3, or Blizzard. Send some screenshots of your map as well, they may not have time to make a test server for your map.
Another option is just to release the map on the Map Releases forum. That way anyone can host the map. You'd want to read the first thread in that forum for information about map licenses.
"In addition to knowing the secrets of the Universe, I can assure you that I am also quite potty trained." -Koenma (Yu Yu Hakusho)