I stripped the paint off the boards, sanded and then cut them to fit. I then primed, painted and installed over a two day period. I think the part around the lock turned out OK.
My picture is bad but here it is now:
Compared to how it looked in 1928:
In my defense, because we took out the closet to the right of the door we had to make both sides match, and be part of a single plane which they weren't originally, so we had to install a shim under the trim, which recesses the lock catch a bit.
Up next: Getting back band cut and fit around the back door so I can then complete baseboards, and the upper trim.