I have a 1970 CB350 and there isn't any type of document holder for under the seat (that I know of). I was wondering if anyone had any ideas of what and how to mount something under the seat to hold insurance cards, etc. For now I just have them tucked by the corner under the little seat stand bar. I'm afraid they're going to fall out some time. So if you know of a specific fix or option, let me know here. THANKS!