Hi,
I can PM you a link to a site which has almost all of the PA Counties precinct data for the 2016 GE in primarily PDF formats
Let me know if interested--- I prefer not to post their link directly into a public website because I don't want the "archivist" to get barraged with requests like: "do you have a copy of county xyz for state abc PRIM results from election 20xx"... it's more like a "self-serve" joint.
I believe it's missing Armstrong, Butler, Carbon, Chester, Franklin, Green, Juniata, Pike, Wayne, and Wyoming Counties some of which you can probably grab from the link DINGO Joe provided or scouting around the PA election web-pages on that link for a '16 vs '18 data-sets).
There's always the old classic NYT 2016 national precinct map, which if you haven't checked out is definitely worth a look through and then some as a ref source...
https://www.nytimes.com/interactive/2018/upshot/election-2016-voting-precinct-maps.html#6.35/40.42/-78.57
