I'm so glad you're finding it helpful, @dmoran. You've probably also seen WHO COVID-19 Confirmed Case Report Form but I do want to draw your attention to it just in case.
I've been in touch with one locale using ODK for COVID-19 contact tracing but I believe they have a customized form. I'll try to find out in the next day or two.
If you have folks ready to deploy forms B1 and B2, I think we should build community versions. Could you please describe the intended workflow in more detail? That is, do you have a sense of how the contact list would be acquired and how contacts to interview would be assigned to enumerators? This will affect the design of the form.