Buy a roll of paper.
Like this:
GRADE "A" A clean low-cost alternative for void fill , wrapping lightweight items or using as interleaving. 9" diameter newsprint roll. Use with 24" Paper Cutter . ULINE offers over 42,000 boxes, plastic poly bags, mailing tubes, warehouse supplies and bubble wrap for your storage, packaging, or...
www.uline.com
Get a broom handle, or larger dowel and cut it in one piece about 1/3 of the other.
Use the longer section of broom handle to put through the roll of paper and suspend from the ceiling, then you pull down on it, fasten clips to the shorter section of handle, clip to the bottom of the paper. Holds it out straight, and weights it.
When not using it, roll it back up. As you shoot up sections, tear/cut them off.
Or just shoot bareshafts and forget about paper tuning.