I just got my Helix LT, so I took a flyer on this case for $40 shipped:
https://www.musiciansfriend.com/amplifiers-effects/road-runner-pedal-board-all-in-1-gig-bag/502055000001000?source=3TEM5KTBK
It's a padded cordura bag, but that's all most of us need anymore (gone are the days of ball corners and butterfly latches, at least for me :)). It's snug at first, but the LT fits without any of the encoders being mashed, and it's rugged. Considering what L6 is charging for a bag, I HIGHLY recommend it.