Hi Alex,
I thought the Saintech mirror coating business changed its name to Palmway optical and was still operating for mirror recoating based in Tuncurry NSW, this is what the about us page says on their web site, i must be behind the times as i was not aware they closed the business or stopped offering mirror recoating, very sad indeed if they have stopped trading. If they are still trading they would be good to contact for more info.
https://palmwayoptical.com/