If you need a roadbook holder I recommend
This is a Portuguese company, and the owner is a friend of mine.
I actually have one of his Roadbook holders with me so if you want to get one you can actually have one in your hands before you buy.
They are one of the brands on the RallyNavigator shop.
I’m really keen to do this kind of rally navigation one of these days, and because I’m no expert what about if we organised a day to learn how to navigate with these tools?