Hi Paul, So sorry for your loss.
3 years ago, we lost our 2 cockers within 7 months of each other. In spite of having 3 other dogs, I was bereft without them. We did exactly what you are not supposed to do and looked online, liked the look of a pup and had him within a couple of weeks.
At first, I didn't bond with Dexter at all - I liked him cos he was a cute, ball of squidgyness, but I didn't bond - I didn't love him.
I felt guilty that he wasn't my beloved spaniels - I felt guilty that he was alive and they weren't and I felt guilty that I had brought him into our home.
Then, one day, I came downstairs - looked at him and fell totally and utterly in love
The feeling was reciprocated and he soon became my shadow and my little man!! (I had never had a male dog before, only bitches)
We later went on to get Alfie and although we don't own any cockers now, I am so pleased we got both of them.
We recently lost our beloved Josie but now with 4 dogs, we feel we are still complete as a family so we are not getting another dog - but I fully understand why you would want another.
I wish you luck in finding another dog to help blur the edges of the hole left in your heart.
Keep us posted.