You might contact your local breeders. When I decided to adopt, I didn’t know there were rabbit rescues. I called the breeders.
They might have people who have likewise called looking for pets. They probably also know the local fosters that might not be official rescues.
I would be cautious because this is when people buy 4h bunnies. Which, I am sure there are people here who have done 4H, but I mean cautious that the intent is pet quality and not the types of stuff we don’t talk about here.
I don’t know if you have a Petfinder and I don’t know if they have bunnies, but its worth trying. They foster until the pet gets a forever home from what I understand. I know our local Petfinder foster parents are given vet vouchers and discounts, so their animals are well take care of.
Also, if your vet has a bulletin board, you could make mini fliers and ask to put them up. You’d still have to screen, but people who are at a vet hopefully have the right intention for pets.
Other than that, all I know to do is keep at social media. Maybe send some private messages to friends you trust and ask if they’ll do a post or share your post to extend the base.
I know these aren’t the most clear cut options, but I wish you success in finding happy, good homes for your babies. I hope your sweet girl is feeling better today too.