Back when Grey Knights first came out in the early 2000s Coteaz came with a whole retinue. One of those was a regal looking acoloyte. I bought this guy specifically for the book at the end of his staff. I clipped it off and added it to a Dreadnought I was converting for my Grey Knight force. He's been sitting, incomplete in my bits box until this week.
I went ahead & pinned a veteran space marine's banner pole to the top of the staff & it seems to fit nicely. One cheat I use all the time is drawing texts on scrolls. I use a .005 black Micron pen to literally write over scrolls. It's a great way to quickly add scrip marks to banners, pupils, or simple tattoos.