Absolutely agree, there's a need for a space.
Though not sure the best place it should reside in in is FWR, as this is a topic space designed fo debate about female issues in general, and the theoretical nature of debate wouldn't support immediate needs and requiements for help. Otherwise, we'd just include every female experience in the FWR topic - domestic violence, sexual assault, workplace discrimination, judged for wearing certain clothes - in FWR. All are relevant for FWR, but lots have intial homes in other places in Mumsnet.
So a topic thread in the right place to address immediate support, signposting etc.
(As above, I don't think FWR would be an immediately natural place to gravitate towards after an assault. Why would you seek out this topic to post given that the website, as a whole, is female-centred in its nature, with so many areas for seeking support. Let's think about the most natural 'landing place' for someone who's just experienced sexual violence)
A question back to you OP - where do you think the right space is on this website to support attacks and giving support and to where to get signposting/references to support in real life?