two independent 2 IN 2 OUT sequential switches each toggled by a different style of logic flip flop.
SRDC inputs accept +/-12v. comparator set at 1v. sequential switch IN and OUT accept +/-12v. IN and OUT of the switch can be reversed or mixed signal if the other modules allow this. for detailed specs refer to the datasheets
http://www.fairchildsemi.com/datasheets/cd/cd4013bc.pdf
http://www.analog.com/media/en/technical-documentation/data-sheets/ADG411_412_413.pdf
http://www.muffwiggler.com/forum/viewtopic.php?p=2305353
No info about availability.
$140