Inquiry about Premium RFID-Blocking Leather Accessories

I am seeking OEM manufacturers in China to produce high-quality RFID-blocking leather accessories, including wallets, ID card holders, badge holders, and key fob holders. Requirements include full OEM production support with customization of the internal shielding layer, experience in integrating RFID-blocking materials, and specification of shielding materials such as aluminum foil or conductive fabrics. The manufacturer must provide frequency protection data for LF 125 kHz and HF 13.56 MHz, with attenuation data preferred. MOQ should be 50-300 units for the first production run, with sample development before bulk orders. Location preference is Guangdong, Shenzhen, Guangzhou, Dongguan, or Zhejiang. Please provide company details, factory location, product catalog, MOQ per product, shielding material information, sample costs, and lead times.