Sharpcat...Hadj is right. Seasoned wood (years, not months) is the first requirement for a good cue. You are not likely to find such well seasoned wood commercially, after all, the good stuff goes first. Your cuemaker, whoever he is, has a huge head start on you in materials, and he or she has wood ready to be turned into a cue. No doubt there is great wood available, internet and otherwise, but much time will be needed to season it. If your cuemaker can email pictures of cues, you can also see examples of materials available. So unless the tree in your backyard is struck by lightning, and you want a piece of the tree to make a cue called "Wonderboy", trust your cuemaker to have some great wood. You may just recently have become interested in cue woods, but cuemakers are ALWAYS on the lookout for the best they can find.
good luck
paul