Ok i had this kind of mold platic that i bought some years ago for figurine things. Anyway you put it in boiled water and give it the form you want after that you let it dry (10-15 min) but the beauty of it, is if you dont like it or its break.. just put it back in boiled water and shaped it again.  This plastic or whatever it is.. is really tough, you can bend it a little but still this is strong.

So i did mold the steering piece and this is what i got:

image

Now i made a rough finish, but this will work for the first test.

Later!