As this is no longer available does anyone know what the alternative might be

The TDS 107 Anti-Bacterial Honing Oil is as important as correct
setting to ensure the machine gives maximum performance.
The oil has been specifically developed to give maximum wheel life,
cleanliness and cutting efficiency; and it is anti-bacterial.
We, the manufacturers and patentees (Pat. No. 19956/58) of the
machine and application, do not take any responsibility for the
performance of the machine, should any other type of oil be used.