Very sorry for the cancellation!
Inventory available for pro purchase is fluctuating constantly due to retail demand. We do try very hard to keep inventory updated, but because our manufacturers drop ship and fill pro orders after retail orders, occasionally some of these are canceled before being updated on the site.
We wish we could replace your cancelled item with an item is in stock, but unfortunately we cannot. We cannot modify/ edit orders once they have been placed. You will need to place a new order for the new item.
Questions? Contact our customer service team.