I only had mine to the track a few times before I sold it, but it did fit in my Trinity transmitter bag. I had the big black and purple one, it was a close fit but it did go in.
Last time I was at Willis Hobbies in Mineola, NY, I noticed some SpeedMind transmitter bags. THey were custom made for different transmitters. I know I saw one for the M8 and one for the Futaba 3PDF, I don't know if they make one for the Lynx though.