Harken Flat Cam Riser

Hi Simon I believe you have 75mm long screws and the next size up and longest we have available is 100mm https://www.tridentuk.com/gb/m5-x-100mm-pan-head-s-s-machine-screw-1-pack.html I'm interested to know why you need so much height as this isn't usual, is your block set to high or have you something getting in the way of cleating the sheet? Regards David