The manufacturer reports some supply problems:
“Is VSL#3® still available for purchase?
Some pharmacies are unable to obtain VSL#3® due to a temporary wholesaler supply issue. There is no manufacturer recall and VSL#3®continues to be available in retail pharmacies. In addition, customers can purchase VSL#3® Capsules and VSL#3® Unflavored Powders directly through this website by clicking here.” (Not sure if the link to the VSL web site will work as posted)
There has also been a recent legal decision suggesting that Visbiome is the original formula that was researched under the VSL name, and that the product currently marketed as VSL is an imperfect copy of that formula. Nevertheless, I continue to take VSL, because 1) My insurance company would likely make my life miserable if they learned of the issue, and 2) I think VSL is probably close enough for my purposes.