People grieve in different ways. I understand how you feel -- after I lost my first Yorkie, Laciebug, it took me almost 10 years before I was ready..... Now I wish I hadn't waited so long, so many Yorkieless days and nights.
Maybe your hubby is really hurting and needs to fill up the hole in his heart with puppy kisses. If he insists on "puppy shopping", maybe you can bury your grief in research and steer him in the right direction towards a good healthy pups.
hugs to you both