Upvote:2
I have spent several hours trying to find material to answer this question on Christ, the eternal Son (1 John 1:2). I've spent well over two hours, in vain, trawling through lots of books, including one by Martyn Lloyd-Jones and one giving a series of 10 sermons of Aiden Wilson Tozer (1897-1963) - both deceased. I am sure they subscribed to the eternal Sonship of Christ. Indeed, Tozer's book is entitled 'Christ the Eternal Son', the sermons drawn from John's gospel, chapter 1 to 3. Unfortunately, 1 John 1:2 was not included in the scripture references at the back. But I think everyone will agree, "The title of the book says it all."
I can find nothing referring to any Reformed, Protestant authors who did not take 1 John.1:2 to mean the Reformed belief of 'the life eternal' being Christ, the eternal Son. However, I do have publications written by religious leaders of three denominations who disbelieve that (claiming Christ had a starting point in time, having been created, therefore he could not be the everlasting anything.) They do not claim to be Reformed, and although two might think of themselves to be Protestant, one abhors that label, saying they are neither Protestant nor Catholic. This actually lends substance to my answer below.
The only answer I can give is to say, "The answer is 'No', there are not any, because anyone disagreeing could not call themself Reformed, Protestant, Orthodox, nor Catholic."
However, as every Laboratory Chemist knows, a negative result is still a result.
It proves that something is not there.
There's no living (or even dead, I dare to suppose) Reformed, Protestant, Trinitarian authors who interpret "the life the eternal" of 1 John 1:2 as anything other than an expression of the eternal Sonship of the Lord Jesus Christ.