WTB: Ultra 64 Development Board SGI Indy + Joybus adapter

[Project Reality]

I am looking for Ultra 64 Development Board that connects into the GIO expansion bus of the SGI Indy with their Joybus adapter for i can connect retail controller.

I am very serious, contact me without hesitation please, it is urgent.

Thanks.

 

[ghost180sx]

Aren't these extremely rare and very expensive on the used market?