There are a few modern hall effect keyboards, but I don't know if the feel is similar to the old Honeywells. For the keycaps, there is probably enough interest

There are a few modern hall effect keyboards, but I don't know if the feel is similar to the old Honeywells. For the keycaps, there is probably enough interest (given the amount of replica sets) to just cast a run of something extremely close to the originals with the usual mold injection techniques.