You are both correct, Sears Homes are listed under the Secretary of the Interior’s Standards for Rehabilitation Guidelines, but I have been unable to find a list of such homes known. It would be nice to have a list of homes such as The Historic United Methodist Church category has, that makes it easy to confirm and make reference to.
Perhaps someone could come up with a way to make a category like this possible. It's worth a shot here in the forums anyway!
Thanks, David