>>821
So what specific models are you going to request? Just saying that you want 3D models sounds really vague, unless you want him to contact you and discuss it further (which is a good idea). Here's a revised version:
こんにちは
私はcrab_manさんが作ったペーパークラフトみたいな3次元モデルを元にして、ペーパークラフトを作りたいのです。作るために原型のモデルが必要なので、それに関するデータを利用していただきたいです。もし良かったら、使用させていただけませんか？もちろん非営利使用です。
ご返事を待っています。
Crude but literal translation:
"Konnichiwa
I want to use the 3D models made by crab_man [i.e. you] as a basis for a papercraft that I would like to make. Because the original model is important in order to make it, I would like to use the data related to the models. If it is okay, could you let me use it? Of course, it is for noncommercial use.
I am waiting for your reply"