There are a few aftermarket solutions out there, still undergoing overlanding testing at this point. However, Schrader introduced at 10mm (as opposed to 8mm) core in 1994 and you could add that to your rim.
I wouldn't replace the OEM Schrader as much as add a second as I dont think the 10mm (I could be wrong) fits with the same equipment as the 8. So better to have both. If I were you I'd contact Schrader and ask.
schrader-pacific.com
Pro of having 2 schraders? one is you can keep a pressure check live while inflating and deflating. Con is more can go wrong lol.
One of the aftermarket style I was referring to...
Innovative aftermarket performance products for vehicle enthusiasts.
www.apexdesignsusa.com
Another way to go would be something like this...
not affiliated with any of these.