Hi when i was waiting for my booster to arrive i decided to make my own tempory one. What i did was measure the mounting distance then fold a piece of paper in half then draw half of that distance and and then draw the half of the inside and outside curve etc. Then cut out the paper and you should have an equally drawn booster. I made mine quickly in a tech lesson at school using acrylic which wasnt amazing but it did the job, however i rushed the cutting out so its not neat or tidy at all. But basically i kept to the original booster layout but bigger. hope you understood what i tried saying and good luck. EDIT: this was for a 2 bolt magura mount.