Hi, I wonder if anyone out there can help me?

I have been using Denes Gastric tablets to cure my pets' diarrhoea.
- when a visit to the vet was considered unnecessary.
The tablets contain kaolin and work well, but I have been unable to get
them lately.
I have written to the manufacturers to see if these particular tablets
have been discontinued, but meanwhile would be grateful if anyone knows
of a viable alternative?

Thank you, Elle