According to this website it's available:
(UPDATE: Visa at Eilat-Aqaba border
"Visa on arrival" is back at the Wadi Araba/Arava Crossing...)
But I couldn't find any official sources to strengthen this information. Jordan Tourism Board for example doesn't say anything about this update.
("Starting 1st of January 2016, entry visas will no longer be issued at the Wadi Araba Border Crossing.")
So is there anyone here who has recent experiences with this?