Among others I found the following, just in case any of them help!:
Plégai, 14km SE of Šaklai
Plokščiai - less than 20km NE of Šakiai, and Pelučiai - just across the river, less than 10km further as the crow flies, albeit a long way by road
Pagiai - 104km north of Šakiai
Also Pagégiai, Pagiriai, Plonénas, and - this one's in Poland, 35km SE of Suwałki - Płaska.
Peter Lobbenberg, London, UK