We have developed digitizing systems in the past using 3 axis parallel deflection contact probes to generate part data. We have a couple of software packages that could potentially be converted for your needs. We have been working in real time applications since the early 70ís.
I would like to know a little more about your application as far as the system resolution and the accuracy you would like to achieve.
At 900 IPM traverse rate, what would be the method of data collection and transfer?