Where to find 1/12 seatbelt/harness?

Anyone know where to find 1/12 seatbelt or racing harness in the United States. I'm building the Tamiya 1/12 Porsche 935 Turbo. The seats just don't look right without it.

www.scaleracecars.com

Also try the Acu-Stion 935 photo-etch set, there's hardware on there.

The 934 kit comes with the hardware, just no mention of it in the instructions.
I thought the same parts were also on the chrome shot of the 935.
You'll still have to make your own belts though... - Mark