So sorry this has happened - very sad xxx Good advice from Souffle. There are also hamsters for adoption in various places including the RSPCA who have a website for adoptions - it's not the same as having one from being a baby but you might be able to give a good home to a healthy adult hamster
On this page you select "small furries" in the drop down box then put in your post-code. Maybe not right now, but for when you feel like thinking about it.
Search rescue pets in need of adoption today | RSPCA