Films are not made constantly, but rather in batches so the same machines can make many different films. Don't be alarmed if a vendor is out. As the film manufacturers downsize and eliminate excess manufacturing capacity, I would expect more of this temporary unavailability of product, but that does not mean it is discontinued. Reala is a popular film. I really doubt if it is discontinued.
Web catalog pages (if run correctly) are dynamic, thus if a vendor is out the product should be removed. Since Fuji products are imported it may not be clear when new stock will arrive.