Hello RyanandJoy.
Welcome to our Mattress Forum. 
I can see that Spears was acquired by Southerland in 2015. It’s possible that they could give you more information about the model you currently own and point you to something similar from their mattress line.
We can also try to help you find something new, but we’d need some more information about your sleep preferences, what you like about this bed, what you’re looking for from your next bed, etc.
NikkiTMU