Backpack that fits camera cube

I’m looking for a onebag backpack that I can use for travel, which occasionally includes a quite deep camera cube. I’m struggling to find the inner dimensions for the main compartments on a lot of backpacks and the cube I use is quite deep!

Do you have any recommendations for bags that would be able to fit a camera cube that is 18.5cm deep? Preferably 28-36L in size stretching up to 40L if required. Trips vary from 2-5 days with both city and more nature oriented destinations. So far the bags I’ve looked at:

• Fairpoint 40L (fits criteria and only concern is that it’s a bit big for shorter trips without camera)
• Able carry Max (main department doesn’t seem deep enough?)

Any other options? Any website that lists more specific dimensions?

Thanks in advance!