err.. i think u better design yourself and bring your design to engineering workshop.. go find until u get better price.. good luck..

quite hard if u asking here, i think no 1 experienced in building/designing new product.. but i think u can try at serious kopitiam, there is a lot people lepak there.. this is expensive work, if u know the location u have to yourself and discuss the price.. i'm waiting your brand come out..

nice, also TS must consider about material..