Website modification - Building and integration of contactor referral module

We are a small company in South Africa that manufacture wrap doors and panels for cabinetry [login to view URL] (wordpress site) and constantly try to add value to our customers through good service and innovation to increase loyalty and sales. We distribute our products mainly locally but also in surrounding countries/southern africa. Under our customer value-add umbrella we currently have an unique online quoting system that is linked to our website. We attempted to develop and incorporate a courier calculator that can calculate costs based on all our product variables, but left that project for a later stage due to an unreliable and inconsistent developer. We are looking to incorporate a solution (through a linked website or on our site) where we can refer our customers (who mostly are contractors) to end users who want our product but cannot install for themselves. a good example of what we want, can be found here [login to view URL] The purpose of the whole exercise would be to motivate our customers and end users to buy from us and use our product, obviously to outperform our competition. This will also serve as a motivation factor for potential new customers.