And there will never be a way to search by lot number. I and I know others have asked them and they do not even respond. They want to make money and allowing people to search by lot number which is an integral part of the recrd and woould only requre a modification will never hppen.
You can search Green-Wood's interment database online, for free, at
http://www.green-wood.com/index.php/GWC/39/143/detailThere is currently no way to search this by lot number, unfortunately. Still, it is an incredibly valuable tool.