VSL #3 DS (sometimes called VSL #3 900) comes only in packets with 900 billion CFUs (essentially live bacterial cells) per packet. It requires a doctor’s prescription, and is sometimes covered by insurance. Your pharmacist is in error, and it’s still manufactured, but it is very hard to find because the big wholesalers aren’t carrying it any more, and it appears to be unavailable in Canada. I can still get it at Sam’s Club. This product is apparently an imperfect copy/knockoff of the original product that was so thoroughly studied.
The single strength formulation of VSL #3 is exactly the same product in smaller doses/packaging. The packets contain 450 billion CFUs, and the capsules 112.5 billion. It can be purchased directly from the manufacturer if your pharmacy can’t get it: https://www.vsl3.com/get-VSL3 . The show a way to order the DS form also, but I don’t know how they are handling prescriptions.
Visbiome is a new name for the original, well-studied version of VSL #3. It’s packaged like VSL #3, and similarly requires a prescription for the 900 billion CFU packets. Insurance companies that have made an exception to cover VSL #3 DS will likely never have heard of Visbiome, though.