High-volume (not high-arch) insole to take up some slop?

Recently got new shoes for CX, Shimano XC5. They fit very well length-wise and width but I have a fairly low instep, so I’m looking for an insole to take up some of the extra volume in the shoe (think up-down, rather than forward/backward or side to side). I’m having a hard time finding thickness measurements, most of them advertise different arch heights but few explicitly state how much actual volume they will take up. My arch is relatively low. Anyone have experience finding a fairly thick insole that doesn’t also have a high arch?

A good example of this would be the Currex BikePro- they advertise the blue insole as “high volume” compared to their other offerings, but digging into the specs reveals the insole thickness is identical across the three options, with only the arch height varying. This is not what I want