After signing in and arriving at your myISL portal, click on the 'Team Add-ons' tab on the left navigation. Then click the 'Learn More' button.
You will be brought to a page with details about the Medical Professional Reference (MPR). At the bottom of the page, click 'Add to Cart.'
Once it has been added to your cart, you may purchase your MPR add-on. You will then see it reflected in your financials on your myISL Dashboard!