Below are missionary organizations and one company which will help a missionary do a display for when they visit churches to present their ministry. Some other sending agencies for missionaries will also help.
Exhibit Design Consultants
Exhibit Design Consultants is a secular company but produces quality products and services. They offer customization of displays and exhibits, portable display rentals, graphic design, and more.
Helps International Ministries
HIM provides high-value professional services that strengthen Christian ministries worldwide. Among their services is creating displays that help missionaries.
Missionary TECH Team
Missionary TECH Team provides help to missionaries, missions and Christian workers around the world to communicate the Gospel of Jesus Christ through graphic design and creating displays for conferences or other events. MTT has displays available in several types and sizes. All are collapsible and portable.
Mission Display Kit
Mission Display Kits can be used for missionary events, church services, Bible study presentations or other events. Each kit provides a visual element to help tell the missions story with stuff from each mission field.
Missions Linked is selling portable displays on their online store. The portable displays come in different styles and prices.