You could try an HD Sundowner and or an adjustable backrest. I put the back rest on with my stock seat and it seemed to move me up a little and then I put on a Sundowner and the combination definately moved me forward.
Stock seat from, standard,classic or ultra 97 and up will give you more forward and these can be found cheap on ebay. Plus you can go to harley and sit on one first to see if its what you want.
What Gunrunner said, I picked a new Ultra seat for about $50 shipped to me, raised me up a little (more padding) and forward and inch or so, much more comfy for the lil lady to and thats always a plus