You can find a theme in this subforum, just like how you found out Bookstore. Note you need to check Mys v1.3.4 compatibility:
http://mysidiaadoptables.com/forum/f...splay.php?f=26
If you want a totally custom theme, you may have to ask a member to do this for you. I know users like Tahbikat are good at designing custom themes, but I cant be sure if they have time to take your requests. I cannot help you with this myself, since designing themes is not my responsibility.