I post a picture of the tunnel cover, the cigarette lighter is the good one, I found one store which have them new for 195$ (Dennis McCann). Your switch for antenna is not the correct one as you can see it on the picture, it has to be the same of the other swicth but with two direction up and down. On my GTB 79 I don't have either the clip under the hand brake, is it after from the light bulb ? We don't see much on your picture.
308 GTB 1979