Atwood also made jack extensions #87160-there are some still available, not cheap.
https://www.amazon.com/Atwood-87160-Highlift-Camper-Trailer/dp/B00TSSQ6HQRequires cutting off base.
https://www.lci1.com/assets/content/support/manuals/Atwood/Jacks/Jack_Foot_Extension_Installation.pdfThe #40302 sold for the power head (trailer jacks rated at 2000# ea, 2" ID) that might work.
For an inch or 2 and given the cost of extensions, 2x's for base seem simpler. We use anyway, as noted because smallness of the jack base. I run mine near full extension to get off truck, so the extensions would be nice-however the retracted length/hang down would be an issue and interfere with tiedown mounts. More likely to get whacked. Using as removable would solve but induce some wobble so I'd end up welding.