Apologies if this is a noob question, however I have lost my mast gate plate that prevents the main sail sliders popping out of the mast when hoisting and lowering the main. I know that there could be many variants given that not all boats will have the same masts. However if anyone had an idea of were I could buy a replacement that would be very helpful. I have googled already without much results apart from a Mast gates (link below) who do 3D printed replacements.
I suspect that you might need to make one from some sheet aluminium, not hard to work at all. All part of the fun of older boat maintenance.