You can replace that "combo" component with a 90K resistor and two .002 caps connected from each end of the resistor to ground. You can also construct that resistor/cap component using two resistors and three caps, as described in "Replacing the Vertical Stage Couplates" in the following article:
http://antiqueradio.org/PhilcoH3412L...Television.htm
Either way seems to work fine.
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html