Do any RADSAFERs know if DOSITEC, Inc. still in business? We are in need of some information regarding calibration of the AR-20 Portable Remote Monitor. Attempts at using the phone number we have have been unsucessful. The address on the tech. manual is: 139 Newbury Street Framingham, MA 01701-4535 508 620-0783 (Number is disconnected)