Honda-SOHC

Hi everyone, newbie here from Sunderland. I've just started a complete stripdown on a 400/4 restoration project so I'm hoping that someone can help me with spares, local suppliers advice etc.
I had a 400/4 many years ago and thought it would be nice to sort out another one in my old age..... I've restored a couple of Triumph TR6 cars in the past so I have a bit of knowledge. The bike is a '77 F2 model and looks like I'm going to need lots of parts, wheels, engine rebuild, seat exhaust just for starters. I'm also looking for recommendations for suppliers, and services locally.
The bike is almost stripped, first job is to get the frame to the powder coaters in Cold Hesledon.
Any help would be appreciated.

Thanks everyone
Steve