Realistically, you would just sign "PAPER"
to mean stationery.
Or "FANCY PAPER"
You could sign, "I need buy fancy paper for writing letters."
NOTE: When you do a compound sign, the movement of the signs become
simplified. Thus "paper" which normally has two movements, is done
with only one movement when you use it as part of a compound sign.
NOTE: If you are looking
for the sign that means "stationary" as in "not moving" I recommend
you use the STAY sign. See: STAY
You can learn
American Sign Language (ASL) online at American Sign Language University ™
ASL resources by Lifeprint.com © Dr. William Vicars