Homeland Procurement Reform Act or the HOPR Act This bill directs the Department of Homeland Security (DHS) to ensure that procurement of certain items, such as body armor and other protective gear, meets specified requirements, including that a fraction of procurement funds be used for items manufactured by U.S. small businesses. The bill sets forth requirements for waivers based on a national emergency. DHS shall (1) ensure that covered items are purchased at a fair and reasonable price, and (2) study the adequacy of uniform allowances provided to employees of frontline operational components (i.e., Customs and Border Protection and other listed agencies and entities). DHS must report to Congress with recommendations on how it could procure additional items from domestic sources and bolster the domestic supply chain for specified national security-related items, including personal protective equipment and other items necessary to respond to a pandemic such as that caused by COVID-19.