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
Vietnam-era Bell UH-1 Radio Control Frequency Selector
$115.00
Vintage WWII US ARMY Signal Corps Radio Frequency Meter Zenith Radio field tool
$79.99
High Frequency Analog Clock Radio (Model No.8811) BRAND NEW RETRO VINTAGE
$100.00
Audio and Radio Frequency RF Signal Tracer For Vintage Tube Radio TV, Amplifier
$90.10
USAF Extension Course Institute Radio Frequency Lot of 8 volumes 1957
$49.99
High Radio Frequency Levels Warning Caution Metal Sign 12 x 18
$30.00
Crystal Radio Higher Impedance Earphone Wide Frequency with Integral Jack
$18.00
RCA by GE UV-712 1920's RADIO AUDIO FREQUENCY AMPLIFYING TRANSFORMER - Rework
$29.00
1960s NASA RCA Radio Frequency Isolator Double Junction P/N70A
$67.46
Navy Dept CRR-74028 Frequency Indicating Equipment modified
$50.00