Fork swap possible or not worth it? Fat bike tapered
All you have to do to use a straight fork like a Surly is put a reducer crown race on it. The one for this would be FSA part number 160-5540.



Steel forks with tapered steerers aren't popular because things get so heavy. I don't know of any, although that doesn't mean there aren't any. There are some carbon ones like the Salsa Firestarter.