I don't have a lead on tickets really, but if you're looking for someone to help with planning of a Disney vacation we just used Rebecca Hunt with Crazy Imagination Travel. If you stay at a Disney property all of her planning (meal plans, fast passes, daily itinerary, resources) is free. We found it very helpful as first time Disney World vacationers with our kids. I price checked the tickets she purchased and it's no different than buying them yourself.
rebecca@crazyimaginationtravel.com