GT3 381dtg Headset

Hello
I live in Nagoya.

I have a Brother GT3 381dtg t-shirt printing machine.
My print heads are broken and I want to replace them.
Product Number: SB4231201
Where can I buy this product?
If I come to your center, will you help me?

For this product,
Do you sell spare parts?

Can you give the relevant service phone number, please?
Is there a center in Japan?


※OKWAVEより補足：「ブラザー製品」についての質問です。