I am so sorry, I know how much it hurts. We lost our two toy poodle travel buddies last fall due to age and health issues. We decided to wait before thinking about getting another dog but three weeks later Millie, a Shih Tzu/Maltese cross, won our hearts and a place in our home. The house was too empty.
Give yourselves time to grieve, it is never easy, but I'm sure a day will come when you will be ready to welcome a new companion into your lives. All the best.