There are several good and recommended vendors of screen protectors for the BlackBerry. These have been mentioned over and over in the threads at BlackBerryForums.com
Keysight Agilent E2697A High Impedance Adapter
$425.0
HP 4192A LF Impedance Analyzer 5Hz - 13MHz
$1000.0
Teseq ISN T4A Impedance Stabilization Network
$1750.0
AMERICAN FARM WORKS. Electric Fence Controller 15 Mile AC Low Impedance
$30.0
General Radio Gen Rad Constant-Impedance Trombone Line 874-LT NON-Locking Nice
$395.0
