I agree, maybe vacuum forming might be your best bet, but it would be hard to put on, I wouldn't use latex because it is soft and holds a lot of imperfections that would kill your effect. maybe if you devided it up and made the top part plastic and from there down do latex so that way you can still move relatively comfrotably. But as stated earlier, it will be extremely difficult to make or even get advise on how to make it without more pictures.