Show Contact Us button when Availability is Out of Stock, 2 - 3 Days and Pre-Order.
This button is apply in:
4. Wish List
5. Related Products
6. Special Offerst
7. Brand Products
8. Product Compare
9. Home moduls for featured/best seller/special/latest
P.S. This extension is only work with default theme, if you need apply in your customer theme, please mail to firstname.lastname@example.org.