The LNER Encyclopedia

Hello, would anyone know where I could purchase signed books of Nick's or purchase some of the 70s magazines that his drawings were in?
My other half is his grandson and I would love to find some for him.
Thank you in advance

For the magazines, are you anywhere near a preserved railway? Many of them sell old magazines. Possibly useful, the complete Railway Modeller is now online if you take out a subscription: that should enable you to identify the issues with the drawings.