I have two sets of 378x32mm floating disc brake kits that use CP5555 caipers and come complete with pads, bolts, hoses, bolts.. all you would need to supply is labour and brake fluid.
Two sets are grooved discs and the other is the 'J hook design.
These are brand new and are available for £1750 inc vat each until the end of Dec , that's an over £400 saving.
Will fit all Cosworth models (wheels permiting) but could make custom bells and brackets to enable fitment to just about anything.