Any ETA-centric business plan templates out there?

I saw there were a few older posts about this topic, but thought I could refresh. I realize there are lots of free business plan templates out there, but most of the ones I've seen have been start-up focused. Would greatly appreciate if anyone can share or point me in the direction of an ETA-focused business plan.

There are two templates on the SBA website, but they seem a bit too basic? Has anyone used these in practice?

Thank you! Mark