I bought this same JBL Flip 4 case, and it does indeed fit just about perfectly, with space for a small power block and USB cable. I went ahead and bought a different version too. FYI - if you accidentally get a case for a JBL Charge 4, you can fit the LT1 and the JBL Flip 4 case it’s in inside the Charge 4 case. Oopsy!
The max diameter is almost three inches, and the length (height?) is right at 7 inches.
I found an Amazon Basics set of 4 for $15 that includes a 4” x 7.1” case. So far, that’s the closest I’ve found.
wondering if anyone has purchased this yet and tried it out? it would be nice to see if not only the LT1 fits, but also the cable, and a 115 to USB charger, the one I would put in there is 2.5”x2”x1” or so. Dual output, 24W Allmaybe EU2-ST
I have used Op/Tech neoprene pouches for years and they’ve held up well. Their Snoot Boot in size medium would be a loose but decent fit at 3.5” x 8” (cinch the top to create a tighter fit), and it has a belt loop and a snap hook which would allow attachment to a backpack, belt, etc. Snoot Boot on Amazon
An Anker 2.4x2.4-ish power brick like THIS ONE is a snug fit, but the case will (just) close with that brick and a USB cable (and, of course, the LT1).
Thank you @amishbill for this thread. I will look at the ones mentioned here. I have this one in my cart at Amazon and it is still my front-runner to purchase at $15