Anyone aware of a sturdy gig bag good for GJ guitars with an external width no greater than 18"? I'll be traveling via airlines, and part of my journey occurs on the same AirCanada Regional Jet 700 that I took last year in which my 19" gig bag did not fit in the overhead bins. While my Boulder bag (at 17.5") does fit, this year I'll be doing some additional traveling across Europe, and I am hoping for a little sturdier bag, ideally with a neck brace/head lock (which the Boulder bag doesn't have). If you have a tape measurer, and don't mind checking, please let me know if yours fits the bill. - Thanks!