Steve Evans is Ronin Graphics & he does some really beautiful decals, including a 1/72 RAAF C-27J. It is also correct that he only does small batches & once they're gone, unless there's a re-print, there gone. Also, he sells his decals exclusively through his eBay store.
You can also keep up to date with his decal releases either via Facebook or hie eBay shop.
https://www.facebook.com/Ronin-Graphics-Australia-570533299733906/?fref=ts
http://stores.ebay.com.au/roningraphicsaus?_rdc=1
Quick edit... If you look at Steve's Facebook page & scroll down to his post on 10th September 2015, you'll see the decals you're looking for.