Rescues are faced with taking in unvaccinated Rabbits every day. Often into situations where there are numerous other Rabbits. If they didn’t they could not function as a Rescue.
OP,If your own Rabbit is fully up to date with their vaccinations and you quarantine an unvaccinated intake the risk will be small. But if you are not happy to do that you could suggest to the Rehomer that you take the Rabbit to your Vet and get her vaccinated with FILIVAC, drop her back to the Rehomer then collect her again 7 days later. FILIVAC takes 7 days for a full immune response to be established where-as Nobivac Myxo RHD Plus takes 21 days. You would then need to get the Nobivac done at least 2 weeks after the FILIVAC to ensure cover for Myxomatosis.
Of course all this might be too much hassle for you. But it’s what I would do if I could not find a single Doe in a Rescue
ARC (based in Twickenham ) has some, I have known of ARC rehoming to people in Kent. So you could always make enquiries
https://animalrescueandcare.org.uk/adopt-a-rabbit/