Ok, so you've created your product, found the link for the first time, but you've come back some time later to get it again but you can't remember where it is, which has led you here..
Never fear, we got you covered!
Step 1: Navigate to "Order Forms"
Head to the left side navigation and click on the "Order Forms" link. Once this page loads you'll be presented with all of your created order forms.
Step 2: Copy the link and you're done
You should be looking at something like this.