Vauxhall Vectra 2.0 ABS fault?

My Vectra is making a grinding sound when applying the brake. sound coming from the LH front of the car. Sometimes the foot brake paddle will viberate as if loseing pressure but all the wheels hold evenly.
I've change the pads on LH/RH front and back also replace the hand brake shoes, bleed the system using an electronic bleeding system.
could you help with some information on where do i go from here.
I'm 4500 miles from any vauxhall garage or any garage for that matter where i can get professional help and the cost of shippinging a car back to the UK is un-thinkable.
Car Vauxhall Vectra 2.0 1996. manual SRI 16valve