Yes, that is possible. For open-end zippers, the product number suffix is OR for right-side insertion and OL for left-side insertion. For two way separator zippers, the product number suffix is MR for right-side insertion and ML for left-side insertion.
At present, on ApparelX we only have product pages for right-side insertion items, so please place your order from the right-side insertion product page.
If you note in the remarks field at the time of ordering that you would like to change to left-side insertion, we will arrange it for you. We will contact you separately regarding the unit price.