A dear friend gave me a Teddy at DS1's funeral which I clung to as we hadnt got him a Teddy yet. I still cling to that Teddy.
Other than that, we have loads of photos of our boys, we have their Names in the Sand (we did that ourselves). We also have a couple of Willow figurines.

It's great you contacted them. So sad others didnt. It's not like you ever get over the loss of a child.