looking for a prime lens 85mm F1.4

recently i tried to take some indoor volleyball pictures with my 50-200 swd and my 12-60 swd on my e-5. the result was very disapointing, because i tried to work without the internal flash. most of the pictures were blurred because shutter speed was too slow.

a friend of mine is taking picutes with a 85mm lens with a fixed focal length and f1.4. browsing around i stumbled upon a lens from sigma but couldn't figure out if this lens is available for olympus or not (presumably not).

has anybody experience with lenses capable of taking indoor pictures of sports? the lens should be affordable (like the one from sigma).

thx a lot for your help.

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Proud Olympus user.
e-5, e-520, 14-42, 70-300, 12-60, 50-200, ec-20