I went to the Boss website and the new owner Corinna zu Sayn-Wittgenstein has put double rifles on offer in the usual Sxs but also in O/U configuration in calibers from 375 to 600 http://www.bossguns.co.uk/newguns/

No pictures there yet but the site has been developed quite a bit since the new ownership took over. Let's keep out fingers crossed in the hope that we'll see new pictures there soon.

Good hunting!