Dig! PA 2020 General Election Mail Ballot Requests Data Set
Anons. This is a data set on opendataPA of mail ballot requests. I'm not sure how accurate or reliable all this data is but it could be something to go from.
At a quick glance there are plenty of people too old to be alive that received ballots.
2020 General Election Mail Ballot Requests Department of State
"The dataset describes a current state of mail ballot requests for the 2020 General Election. It’s a snapshot in time of the current volume of ballot requests across the Commonwealth.
The reason some birth dates will display as 1/1/1800 is due to confidentiality reasons of the registered votes.
Usually this is for victims of domestic violence."
https://data.pa.gov/Government-Efficiency-Citizen-Engagement/2020-General-Election-Mail-Ballot-Requests-Departm/mcba-yywm