It little pricey ($130), but it has 2" of foam padding and it can hold up to 16" of 8x10 holders (probably 15 to 18 holders). I would prefer to see one and toss the holders in before I'd commit. But a couple of them for my 8x10 holders on a long road trip would be sweet. https://rticoutdoors.com/shop/cooler...ft-Pack-40-Tan

Another possibility, holds 6.5 inches of 8x10 holders -- 8 or 9 holders probably:

https://www.bhphotovideo.com/c/produ...icu.html/specs