As I discuss in this question, the Isha Upanishad has a special property that other Upanishads don't: it's part of the actual Samhitas of the Vedas, i.e. the part of the Vedas whose verses were heard directly from the gods. (It's the 40th Adyaya of the Shukla Yajur Veda.) So while other Upanishads are just philosophical teachings designed to clarify the meaning of the Vedic verses, the verses of the Isha Upanishad are of divine origin.
Now proponents of the Vedanta school of Hinduism don't generally write commentaries on the hymns of the Vedic Samhitas, but they make an exception in this case because the Isha Upanishad is still an Upanishad. The Isha Upanishad is only 18 verses long, but it has been the subject of voluminous commentary. For instance, here is a commentary by Adi Shankaracharya, a proponent of Advaita Vedanta (a philosophy where the Jivatma or individual soul is identical to Parmatma or the divine soul). And here is a commentary by Madhvacharya, proponent of Dvaita Vedanta (a philosophy where Jivatma and Paramatma are totally different). And here is even a commentary by Bhaktivedanta Prabhupada, who believes in Chaitanya Mahaprabhu's philosophy of Achintya Bheda Abheda (inconceivable unity and difference between Jivatma and Paramatma).
But my question is, what about the other major school of Vedanta, Visitadvaita Vedanta, the philosophy of the Sri Vaishnava sect of Hinduism (of which I'm a member), according to which Jivatmas are distinct parts of Parmatma but Paramatma extends beyond them? Are there any Sri Vaishnava commentaries on the Isha Upanishad available online in English?
Ramanujacharya, the figure most prominently associated with Visistadvaita, doesn't seem to have written any commentaries on the Isha Upanishad, but two other Sri Vaishnavas did. The Sri Vaishnava philosopher Vedanta Desikan wrote a commentary on it, which is there in this book and this book, but is it available online anywhere? A Sri Vaishnava Acharya named Koora Narayana also wrote a commentary on it, available online here in Sanskrit. But are there any English translations of it?