I'm trying to locate (to buy) as well as any technical information on a
 TDK NB-58S Ultrasonic Transducer.  The only info I presently have is
 that they operate at approx. 1.6 Mhz and were readily available around
 1990.  Could find no help on web search or TDK's home page.

Is there is an equivalent available??

Any help appreciated.
Gene
Gene_NItschke@wb.xerox.com