Help Finding A Part/Piece

[MXCfan03]

Hello, I'm new here. I have just about finished my MXC contestant cosplay. I have the shoes, shirt, helmet, and pads. All that remains is one final piece, and I really need your help. I am looking for a white, rubber, old-style, sports/motorcycle helmet chin cup. The helmet I bought was missing the chin cup that came with it. I had initially thought that it would be easy to find one on the internet, but I guess not. All I am able to find are the modern ones, or ones that are either clear or black in color. Does anyone have any advice for me or know were I might be able to acquire one? Thanks in advance.