While I was working on the numeric Listener puzzle a few weeks ago, I stupidly used that part of the paper to light the fire with. It was too late to buy another paper, so I searched for a downloadable version but couldn't find anything.
They are available on the Times crossword club site
www.crosswordclub.co.uk
I think you have to join to access the Listener crosswords.
It's about £5 per month or£25 per year.