My converted Ebike is a "Comfort " bike (2004 Gary Fisher Solstice) the 26" wheels and upright riding position give it a steerer tube that's 12" long.
The Coil and oil Rockshox fork it came with is still going strong. But there's no way I'm going to find another fork to fit this bike. I keep a 300mm steerer from Hollandbike around just in case of an incident. If it was steel on steel I would say go with the threaded rod method. But for alloy, and a part that's not going to be easy to replace I would pay to have it done. Cooling with dry ice, proper assembly fluid, heating with an air gun instead of a gas torch, a hydraulic press, and experience doing that work all count for something.
Uncut 26" forks are getting rare, and XC forks tend to be cut shorter than most.