This question should be passed on to the guys in the UK. I'm sure there are breeders with this lines. I have found the address and email of his sister who still breeds, I think. She wrote the book"The Yorkshire Terrier Today".
Verolian Yorkshire Terriers, Veronica Sameja-Hilliard, Rose Cottage,
Hunston Common, Chichester, W. Sussex, PO206 NP
email:
veronicayorkies@tinyworld.co.uk.
If this email is too old, then just write to the postal address.
If you are just looking around like me, have a look at the websites of US dogs like Durrer's, Canadian Yorkies like NicNac and French lines as well as Spanish and German. I must say, I have come to prefer the French and US lines
Have a look at your Australian breeders, what lines they breed or from where they import. You might find everything you want just on your doorstep!
Good Luck!