According to the FAA website, Trans Air has another 737-200, N413JG (c/n 23148, l/n 1059), is listed as its owner as of February 2015. The 737-2Q8 was last listed with Weststar Aviation (Malaysia), with the US N-number. It's current whereabouts are unknown, or whether it will undergo freighter conversion.
23148 was originally ordered by ILFC, and leased to America West Airlines in October 1984 as N137AW. In July 1995, it was leased to Ladeco Airlines [UC/LCO/ (Chile) as CC-CYV. In April 2000, it was leased to WestJet Airlines as C-FLWJ. In March 2006, Weststar Aviation acquired this 737-2Q8, and had the interior converted to a VIP layout, and registered as N413JG.