Is there a part number or price for this sequencer??

It is a dinosaur, I bevieve made in 1972. It is at a lake property and only used 3-5 times a year, so it is in good shape. Last year I used it by turning the fan switch from autp tp on and turned the breakers on and off as I needed heat.[]

I am working on a Intertherm MAC2254 electric furnace. All the syptoms seem to point toward the sequencer. The heating element stays on after the temperature has been reached and the fan turns off. Also, at times the furnace blows warm air and at other times it blows nice really warm air as if one c...