Here are the component details of the handle bar pic I posted.
Sorry, I should have included them with the pic.

The flat bars are pretty standard, though I've shortened slightly.
Bar ends and 'thumbie' gear converters were from SJS Cycles, here in the UK.
Grips are Ergon GP1 Lightweight.
Stem 110mm, 17deg rise.

I've left the steerer tube uncut, I like my bars high.
As Vik has mentioned, you need to consider the reach when using flat bars.
But once set up, the LHT with flat bars gives a stable, comfortable ride.

Mike