Second what MK says on 777 and others, there's a heap of options which is really good, some good ones mentioned.
Also Chromag OSX flat bars if ay can find em, Race Face Atlas, do a nice reverseable atlas integrated stem too.
Even Salsa have been on the wide flat bar for awhile, I saw a top local DHer running one back as far late 06, ah seems so long ago!
If ya got the ape hangers and shoulders once ya go wide ya never go back, now ya just got to sort out a stem to support it, I was onto it before nailing myself I love wide bars on every bike, trees no issue, though recently I did shave a cut down stump that got pretty hairy, my fingers on both sides still in tact
Just a side note though, if running integrated stem, there has been a rise Ive noticed in stem failures especially these single sided light weight jobbies,, though even read some e web gossip about SV1s but hard to tell if real or just brand knocking, I love Sunline stuff but have not used there IS version, just a thought it may or may not be related, I always like a face plate for stiffness at minimum, I doubt I would ever run a really wide bar and a single sided integrated stem like P1s for example again not knocking that product but I don't like any of those designs, weight alone is not a reason I choose a stem or bar, unfortunately looks like Thomson has followed that design route!
But plenty of others out there so no biggie, but maybe something to think about for peeps, maybe not an issue on a 6" or 5" rig as the leverage even on a wide bar is not as much as a DH bike or even a FR bike, sorry just random thoughts typing out
