Hello, I just wanted to share that I've just tested this Calibre plugin and it is now working again:
https://github.com/mmagnus/Pocket-Plus-Calibre-Plugin
I don't know for how long... Anyway, it can download articles in Pocket to Calibre and have them converted to ePub in a batch. Then it is only a matter of pushing the "book" via USB (or dragging the generated ePub to the Tolino cloud). Not as good as having Pocket run natively on the e-reader, but does the job.