Writing papers to 'docx'

I’m trying to finish writing up a grant and I’m collaborating with people that specifically want a ‘docx’ format. It seems like I should be able to do this using Weave, but I can’t figure it out. Do I absolutely need to weave to latex and then pandoc it to docx?

I don’t know if you absolutely need to do this, but this is what I would do.

Or you could show up on the doorstep of your coauthors with clothes packed for a few days, and announce that you shall teach them \LaTeX (don’t forget to bring some minor gift, like a bottle of wine, and maybe a copy of the Lamport book).

Both should be faster and more enjoyable than doing anything with docx.