cannot locate any ST 2.5 front calipers etc for mondeo st upgrade, am at my wits end with a squealing front brakes, had on warranty 2 new discs and 3 sets of pads from differing manufactures and new caliper to try and rid problem but it seems that once the pads have bedded in after a week the squeal starts on the drivers side this time when braking, at its worst it was squealing when driving in a straight line when not applying the brakes at all.

Brand new bosch caliper and brake fluid changed to best quality.
I need new discs and pads again to get rid problem - what would you recommend ??
Car has been remapped, decat etc, just had new front tyres fitted so brand new yoko C Drive's all round.
cheers guys
Smartst.