Ancient inkwells show up from time to time on the antiquities market, for example, currently, here. And a number of them were excavated at Qumran. There is also one in the Schøyen Collection (cf here) that is reportedly from Qumran. It is good to have another one from a controlled excavation. I hope they find some ink traces in it for analysis.
Visit PaleoJudaica daily for the latest news on ancient Judaism and the biblical world.