ALL SUGGESTIONS APPRECIATED

I bought my new RST about 2 months ago with a braking problem and I still can't seem to solve it so I'm turning to the peeps of PF...please HELP as its doing my nut

The steering wheel / dash vibrates really badly when breaking.....It doesn't really do it at low speed mainly from above 40mph.....If I brake really hard it disappears (its just under light application of the pedal).

The following has been replaced with no change:

Wheels and tyres (all perfectly balanced up)
Suspension and springs
Rear brakes (changed to discs)
Front track control arms (all the bushes are tip-top as well)
The tracking has been done (The castor is out on the near-side 3.5 degrees)

The front brakes are ST170mm 300mm discs and calipers which have only done 2k and I really don't think they are warped (they are not Ford discs).

Has anyone got a set of these discs knocking/laying about that I could try to elimnate this (I don't fancy buying another pair on the off-chance).

In addition my mate (who I bought the car off) bumped into the kerb last winter pushing the off-side wheel back the following was replaced: the anti-roll bar (replaced), the off-side mounting point (replaced) and the TCA (replaced). He doesn't think the vibration was happening after these items were replaced it just suddenly started afterwards.

N.B. The drive shaft was pushed back far enough that it hit the chassis (where i comes through the inner wing) bending it slightly.

Can anyone suggest what could be the problem before I start replacing any more parts (or burn it )

Could there be something bent on the drive (i.e. shaft, C.V.s, hub etc...)