first the first, how extensive the damage on your leg is, why im asking this? because you can desing, manufacture and print any great prostheses....and wont work at all. you said you live in cold weather, how cold it gets there? especify exacly the types of activities you want, from there we can help you out to desing whats the best type of protheses you need, and dont wana sound rude but, do you have any 3d printer at the moment? do you know how to do 3d desing? questions.... questions.... questions....