Adding a disc caliper mount to Springers

Hi,
Has anyone experience of mounting a disc caliper on to springer forks?
I was thinking of getting a 6 bolt (160mm disc) compatible hub & making an alloy plate to slip on the wheel axle between fork end with some means of stopping the plate turning.
The plate would extend to the required caliper mount position.
Anyone have pictures of similar systems?

Barra_Boy.

Thanks Guys for your quick response,
Took your advice & looked at Venice Motor Bikes solution which looks really neat and well made.
However, I'm on a "Low Budget" for my first MB project and with shipping costs taken in to account not the solution for me! (Sorry Venice!)
As an Old Engineer part of the pleasure I get out of building Bikes (previously without a motor!) is coming up with cost effective & alternative parts which I make with my own fair hands.
Hope I can come up with something that looks a good as Venice!!
Regards,
Barra_Boy