WR was anticipating this. So, they already recently introduced BDTS JAM Humsafar & also added Sleeper coaches to it. It runs triweekly. Duronto was also planned up to JAM, but it would have eaten the AC Passengers of this Humsafar, so Duronto is only up to HAPA.
Also, JAM must logically get the Entire Quota of Veraval in Saurashtra mail.