Last Saturday, we had an accident and our two cordons got out of their cage. Both females, we've had them for almost 3 years and they were a VERY bonded pair. Well, in the events that ensued, one ended up passing away.

I was listening to some bird clips online, and she was getting very excited when she heard them, flying more than she has since the accident, and chirping away. And it got me to thinking, when should we find her a new cage mate? She was so close to the other one. They'd sleep together, preen each other, and do the mating dance to each other even, lol!
We currently don't have any other finches, so I can't just put her near another cage or anything like that.
So, she seems healthy and is getting around fine, but her tail feathers are going to take a while to grow back, obviously. I don't want her to be lonely, but I don't want her to be picked on either for not being 100%.
So, when do you think we should start looking for a new friend for her?