Mostek MK6049N datasheet wanted

Does anyone know where a datasheet for a Mostek MK6049N IC from a Hammond 126222 electric organ can be found?
From the PCB layout, they are 40-pin DIPs and may be tone generators. Each tone circuit has an external coil and transistor.
No photo as I don't have a cameraphone, the date codes are unreadable. The organ was demolished, all keyboards are destroyed.
Hammond Organ Company appears to not have a Canadian address, not currently found on maps.google.ca .

Google "Mostek MK6049N datasheet" I got lots of hits.

I got four hits using quotation marks. None of those results provided a link for datasheet acquisition.

I did it without the ""

Hammond - Custom Divider/Keyer LSI- 40 pin.
Used in much of the 1970s and early 80s production (MK6049N)
075-000429 Divider/Keyer LSI--Custom
Hammond 8100 series Aurora also uses it.