You would need to purchase a phone from some source or obtain one from a friend or family member if they have one.
Your options are to purchase a phone at full retail price from Verizon.
Check into the Certified Pre-owned Phone program that Verizon has.
Purchase a phone from a third party individual or a site such as eBay, swappa, etc.
Obtain one from a friend or family member.
Bear in mind that whatever source you use, the phone must be a Verizon branded phone.