I have 5 spare 200kHz xtals at US $ 25 each airmail posted... Type CR-47 U. If all else fails I recommend contact with Jim Little at Universal Crystals at Kansas City. He made me 3 LF xtals at 89.98kHz for a special project and thet worked out AOK Pete D..Williams METUNG, 3904 AUSTRALIA jupete at bigpond.net.au