Not sold at retail, but you can browse Shimoda
Some links here are affiliate links. If you buy through one, Creator Gear earns a commission, at no extra cost to you.
Creators cited with this
Nick PageYouTube, 153K followers“…it's also worth noting that this particular core unit that I use is the large core unit from shimoda”
Watch the video at 9:54
Creators who use this also use

SmallRig Folding Multi-Tool Set
also used by 1 of them

Wireless Remote Shutter Release
also used by 1 of them

4Monster Quick Dry Travel Towel
also used by 1 of them
Breakthrough Photography Filters
also used by 1 of them

Claymore Capon 40B Red Clip-On Cap Light LED Headlamp
also used by 1 of them

Clean & Clear Microfiber Cleaning Cloth
also used by 1 of them