Ken,
There are a couple of choices I can think of:
1: Use a brush in motion and check the “write on” option. Kinda tricky to do without using a pen and tablet as Motion senses pressure of the pen and affects the brush stroke accordingly. Plus this is down to your own skills of calligraphy!!
2. Check out the LiveType fonts. I seem to remember there were one or two that had that write on effect. But they might not be in the font stye your were looking for.
3. The way I would do it is to type up your text in Motion using the desired font and then keyframe a mask over the word to reveal the letters over the desired duration. I use this method all the time to give the effect of text being written, or to show organic growth. May take a couple of attempts to get it right, but works well.
All the best,
Simon
Is it me or do I spend half my life watching little grey bars turn into little blue bars??