I have for sale the Kenwood YK-88C-1 500hz CW for $60 plus 4.95 priority mail shipping and the INRAD #22 (250hz at 8.83IF) for $70 plus 4.95 priority mail shipping These will work in the S850/450/690/930/940/950/570 series of radios.
I can take paypal/check/MO. Buy both and I will pay shipping.
73s John AA5JG