Replacement front cortina uprights 7.5 kingpin

[gtrclive]

Does anyone know where I can get Cortina replacement uprights, with 7.5 degrees of kingpin angle. They have removable spindles and are lighter than the standard ones.
I got a flyer at Auto Sports show 2 years ago, but the damn thing has no address or telephone number on it.
They where from the grass track / autocross racers section.

Any help finding them would be great.

Cheers Clive