also could use a Brother office type labeller
You are a bit limited with letter sizes and fonts, but the labels on my 6-year old -9a are in fine shape, even being stored outside all that time.
I can't believe that the little white laels next to my fuel filler were still pretty much intact when I updated them this year to show mogas etc.
the clear ones on the panel are fine....I even had to MOVE one of them...it just peeled cleanly off, and I re-attached it in another spot!
another choice is to layout all your labels and placards, and have a sign shop print them on a large format digital printer. You can get 2 of everything, in case you mess up. The layout can take some time, so don't expect it for free, but you can control the size, colour, and font 100%.
be aware some of the restriction placards have a minimum size ( 3/8" or something here in Canada). Most just say, "must be clearly visible to the passenger....." etc.