Plastic injection project nozzle and sprue bush information

I am searching for someone who has a background and knowledge in plastic injection moulding. My project consists of 2 moulds for sunglass frames, 1 for the main frame and the other for the 2 arms of the frames. I have made a horizontal 4 tonne hydraulic injection machine. What I am needing help with is the correct sprue bush and injection nozzle for this application. I will be using hdpe plastic , I need someone in this field of work to give me information on where I can buy the correct nozzle and matching sprue bush . I will supply all information I have at present. Thanks piix86