Let's say you're a fan of Galactic and you would love to have a nice crisp Galactic DAT in your collection. Run a tree for it. Not only do I not know how to run the tree but I have no connections to Galactic tapers. This is what I recommend. State openly that you are seeking a kind taper to seed the bad boy and get the ball rolling.
Tapers love to spread music through trees.
So, ask for someone to email you about getting a seed for a tree. Don't worry, you'll get a copy. Ask him or her if he wants his name to be known. Then, make up a sign-up form and post it to the various newsgroups. You could include the basics.