I've found my local copy of the website and placed it with a free hosting service InfinityFree. I've also updated a couple of the pages to reflect the present situation.
The new address is http://dslstats.42web.io
Ever since MDWS closed I have been saving the datastore from DSLstats - several years worth of historical data now!
Apart from the RPi2 needing to be rebooted every six months or so, a single bad SD card and the minimize button not working in DSLstats it hasn't missed a beat.
At some point I hope to have FTTP but until that day comes I find it essential to have the stats especially when there is a problem with the line - although rare it has been invaluable when there has been a problem.
Usage of DSLstats is probably dwindling but is still valued so keeping the site alive is appreciated.