Brooks dimensions? drawing?

Hi, has anyone done a brooks B17 saddle dwg to save me time? this saddle has very short rails and the rail are unusualy far forward on the saddle so if you are designing a touring bike where you know for sure the rideer will want toi us e aBrooks, it's wiorth designing for it as the rider will otherwise have to use a 35mm layback post to their ass back the the same place as on other saddles.

Thanks,

Scherrit.