Halloween // Advice for a chainmail costume

We're doing a LOTR watch party for my wife's 30th birthday. I want to dress up like Gimli in the Two Towers when he comes out with the chainmail that is too long for him. I am looking for advice on the best approach to this. Everything I've seen online is just typical chainmail shirts. I have access to a 3d printer but I am not sure I have the skill to produce something like that. Any advice is appreicated.