Since http://mos.millenium.org seems to be down for the moment, I’ve got a basic Glicko calculator up at http://deathmax.kodingen.com/gw2/wvwcalc.php.
The deviation, volatility and old rating values can be found in the https://forum-en.gw2archive.eu/forum/pvp/wuvwuv/Updated-world-ratings-October-26 thread.
If http://mos.millenium.org stays down, I’ll probably code up a proper replacement.
(Psst, my math might be wrong, my new ratings seem to deviate about 5 points from the officially released values)