Russell Moccasin will make custom snake boots to fit.
I have had several pairs of Russell boots and they are worth every penny as they will last a lifetime and can be resoled and rebuilt by Russell.
I currently have a pair of Professional Hunter (PH) boots with a Turtleskin inter-layer between the outer canvas and inner leather liner. The Turtleskin is impervious to snake bites and cactus thorns and can be incorporated into most of the boots Russell makes.
The standard Russell snake boots are pull-on style as they provide the same level of protection around the entire leg where lace-up boots cannot provide full protection in the tongue area of the boot. The Turkey Hunters with Turtleskin would be an example of a calf-high lace-up boot.
Another option would be
Gokey Custom Snake Boots.
Gokey is now owned by Orvis, but they still will make custom boots. As with Russell, they are a lifetime boot and can be resoled and rebuilt.
A final option would be custom boots from WESCO. While they do not make a specific snake boot, a pair of custom height
Women's Boss boots could be made with heavy leather plus a leather inner liner could work.
I have a pair of WESCO custom boots and they are truly a heavy-duty boot that will provide decades of wear.