don't know if this will help but look at this keyboard
https://sslserver.com/www.microexpress.com/eshop/10Browse.asp?pos=+8
and these references
http://k-ray.netbox.be/?&jq=04002
http://www.sejin.com/product/product_wkbd_standard.html
the carrier freq looks to be the same and the description of the reciever looks to be the same so it would PROBABLY work
I saw this keyboard advertised on ebay for $30