Not of great use to you in Oz but the Wiltshire and Swindon Records Office in Chippenham Wiltshire has 3 copies 2 of which are in the strongroom and one on public shelves in need of some repair.
We visited last week so info is current.
By luck we found someone to lend us a copy and have had time to read most of the detail before giving it back. We have extracted a good deal of the info for our own tree which we are still updating. So far we have included over 1100 Perretts in our tree all in the UK.
If you have access to Ancestry.co.uk or Genes Reunited you can view our tree - Morris / Pinfold. My mothers maiden name was Perrett.
We would also like to buy a copy - at a reasonable price and we can confirm it is an interesting read.
We are planning to go to the P*rr*tt Society AGM on 17th May to meet with other interested individuals although we havent joined this society yet.