I think Nitto bars are available via Hubjub but if I remember correctly the moustache bar, similar to the Mary but silver and plain, is out of stock.
Incidentally, from seeing the Mary's 'live' they look good for cruising on the road or towpath pootling but wondering how good they'd be offroad when out of the saddle and wanting to really heave on the bars? Any first hand experience would be great