I have joined Tour Guide Mike for the past 2 trips. I won't go to WDW without him! He has sample touring plans, which we follow and are great. But it isn't a custom service where you pick what rides you want to go on and you get a customized touring plan.
For Tour Guide Mike you can follow the link at the top of this forum for a $3 discount.
I think touringplans dot com (can't post url's) will customize plans for you, but I'm not 100% sure. That is the companion site to the Unofficial Guide to WDW book. We used the sample touring plans from that book on our first trip with very little success.
Have a great trip!