Westland built one Blackhawk from a kit after Sikorsky took a stake in the company. The plan was to assemble aircraft at Yeovil for sale to the Arabs and so avoid the then boycott problems which stopped them buying direct. No business ever developed - possibly because the politocos were still more interested in developing a "European" solution to the Westland problem, despite Sikorsky baling the company out and keeping it alive (with Agusta's help). I don't remember a serious supply bid ever being for them to supply Westland Blackhawks to the UK