I didn't even know Sparco made those. Kinda cool. The Pro Tool Bag looks good for travel. Seems to have a low profile that could easily fit in luggage or Pelican 1510 case. No listing of dimensions though.
I have had a couple Sarco bags. The zippers fell off of both, and stitching came apart within a couple months. I only got to use the duffle bag 3 times before it was useless.
I love their actual Motorsports products though. The seats and harnesses are great.