Natural branches rather than dowel or cement perches are appreciated by all birds and many other tree climbing pet such as sugar gliders or short-tailed opossum. I am bringing to the office a good number of maple tree branches available, differing sizes. I give them away, but suggest a small donation to the Washington Ferret Rescue & Shelter (how about 25 cents per branch)? Please call ahead to make sure we still have them (first come, first serve).
I usually have branches available 1-2 X a year as I prune my trees/bushes.