This is so interesting. I'm so glad you have found a way to learn more about yourself.
I probably would not buy anything for a while. I have different bears but have not really paid attention to which bear is out when and have not used them for therapy even though T gave me two of them. It might be interesting to do that though as I have noticed that different bears are out on my bed or out and about at different times (a lot of them sit on the window seat in my bedroom).
I do find though that things disappear and then I panic, searching, and yet not finding. Then later, that object will turn up as if it was never missing. My T said there are reasons for it and if it's meant to show up, it will. It usually does. Sometimes I discover the reason it disappeared for a while, sometimes not.
In my opinion, anything that helps with healing should be used, whether it's a dinosaur, bear or a dust bunny.

If the objects are helping you learn more about you, keep going.
Best of luck to you as you discover yourself. I hope the dinosaur will show up again when it's time.