Blind flying Panel Mounts

Firstly an easy question: What is the hole size, thread size, anti-rotation hole dimension for the big mounting holes on a BFP? My replica is dimensioned mainly from photos and it would be nice to get this spot-on.

The hard bit: Can anyone post a photo of the rightangled anti-vibration mounts as used on the Lancaster BFPs (not the same as the ‘Spitfire’ ones)? If you have any of these to sell, please PM me.