Al-Qadim (D&D Arabian Adventures)?
I love Al-Qadim! It was the only D&D I ran for years. Unfortunately there isn't a good version of it in the current D&D rules (3rd edition through 5th). While I am working on a 5e hack, it's a long way from playable.
Of all the recent editions, 5e is the best fit for Al-Qadim. The Rogue and Warrior kits are mostly simple Backgrounds. Some bring slightly modified Martial or Rogue archetypes or Bard Colleges. The big problems are Wizards and Sha'ir. As for priests, the hakima and kahin also need some work while the Pragmatists, Ethoists, Moralists, and Mystics are simple backgrounds.
Now, if someone is willing to run Al-Qadim, I would love to play. And once I'm ready to start play testing my 5e hack, I will be putting up an interest thread.