Hi Greg;
I found this recipe in an Amish cookbook which I purchased at the Das Dutchman Essenhaus restaurant in Middlebury, Indiana.

GRAHAM CRACKER PUDDING
18 graham crackers
¼ cup sugar
½ cup butter
Use a rolling pin to turn the crackers into crumbs. Add butter and sugar and mix well.
Line a dish with these crumbs, saving a few to put on top.
Custard filling:
¾ cup milk
3 egg yolks
3 egg whites, stiffly beaten
1 package lemon or orange jello
½ cup sugar.
½ to ¾ cup cream, whipped
Bring milk to a boil. Add egg yolks and sugar. Remove from heat and add jello. Allow to cool and partly set,then fold in the stiffly beaten egg whites and the whipped cream. Pour into crumb lined dish, sprinkle with remaining crumbs and chill.
I hope this is what you are looking for.