Blu-ray coming 2/14/17
Twilight Time will release Edge of Eternity on Blu-ray only on February 14, 2017. This is part of their ongoing series of limited-edition (3000 units) Blu-ray releases.
The price will be TT's standard $29.95 but as of this posting (October 18, 2016) details about extras and the pre-order date are not yet available. I'll amend this post with that information once it's known.
The film remains available as an MOD DVD from Sony Classics, in a good print, but the Blu should be something to see.