Disc Brake Adapter for Yr '99 Marzocchi Z.3 QR20

[Funny Funny Ins]

Hello

I want to switch to disc brakes but my '99 Marzhocchi Z.3 QR20 don't have any disc mount tabs on
them except 2 threaded holes on left of the fork for attaching a adapter. Where can i get such
adapter kit from? BTW, i'll be using Hope Mini.

thanks