I know this all will be terribly upsetting for you, I have went through losing a bunny twice and it was devastating.
I am of a completely different frame of mind though with respect to getting other bunnies. I feel that there are so many rabbits out there that deserve to be loved and have a happy loving home and I feel that I can provide that. The reason that we feel so upset and sad when we lose a beloved pet is because of the love that they have given us during their time with us. For me, having that love far outweighs the upset and grief that occurs when they pass.
I know we are all different, just wanted to offer a different perspective.
You will never replace the ones that you lose, but your heart can be big enough to love another