We do test some other fiber such as Mohair occasionally. However, our OFDA's do not have a cashmere calibration so I would be using a Merino wool calibration to analyze your samples. Charge would be $2.50 per sample.  I’m sure you are aware of the commercial wool testing lab – Yocom McColl in Denver, CO http://www.ymccoll.com/.  I know they would have the capabilities to test cashmere as well.  Please let me know if you have any further questions I can answer.