I went to the Bike shop where I bought my bike today and they had A motive Spark with a Rock Shox suspension fork setup complete with FSA headset and adjustable riser. It had a front disc brake adapter which I didn't know was needed. He has a guy that comes in and has already done a dozen of these conversions. It only takes about an hour.
He told me they can do the conversion for $400 which includes $350 for everything needed and $50 labor.