Jane, Spike knew how much you loved him, and even if you were not there physically, he was not alone when he passed. He had you and your sons love. Sometimes I think they choose to wait until no one is around.
That is great that you are going to get a new beardie. I am sure Spike will lead you to the perfect one. And of course you must post pics!
Hope you and your son are doing well.
And remember, Spike knows how much you cared.