I spoke to the manufacturer of the SY-4KS, it's name in the US is CPRO-2E4KS and it's available from Dino Bozzi @ Globe Electronics, 295 Route 46 West, Fairfield, NJ 07004, (973) 882-9882, (973) 882-9886 - fax.
Cost for the CPRO-2E4KS is $155 plus shipping from NJ.
From the manufacturer.
Hi Thomas,
Please contact Mr. Dino Bozzi below. He will help. And, the model name in the US is CPRO-2E4KS.
If you need further assistance, please let me know.
Thank you,
Chiungfang Hsu
------------------------------------------------------------------------------------
Cypress Technology Co.,