Saturn to PC Controller Converter

Hi. I would really love to get my hands on a SEGA Saturn to PC controller converter.

I have seen quite a few similar prodicts out there. I have seen PSX and N64 to PC converters. I have seen SATURN to Dreamcast converters... and so on. But what I'd really like to have is a Saturn to PC converter because I love the Saturn control pad so much and I'd like to use it with my PC.

So, does anyone know if these exist... and is so where should I look?

The documents are online, but there's no market for it. You'll have to buy some extension cables and build your own.
Hrm.. that's a shame. So many gamers seem to love the Saturn controller, you'd think more people might want such a product. Oh well.

It's probably over my head... but can you point me to the documents you mentioned.