I had not realised earlier, but there are 27 works of Ephraim Graecus online in English! Credit for this goes entirely to Tikhon Alexander Pino, a PhD candidate at Marquette University in Milwaukee, WI. The list of translations is at his Saint Ephrem blog, here.
Around half of the translations are his. The remainder were made by the late Archimandrite Ephrem Lash, and posted online by him at his own, now vanished website, anastasis.org.uk. Fortunately Archive.org has kept copies of these.
It’s really marvellous.