Mrs. BlastFromThePast and I frequently shop at Sam's Club.
Every so often we purchase these humongous rolls of plastic food service film.
A roll lasts us for a very long time, but when it does finally run out, I am left with some interesting packaging parts. These are the plastic supports found at each end of the box for holding the roll core for dispensing the wrap.
Of course, they have the appearance of fancy bases for rocket stands.
A length of dowel, a wood screw, a spent motor casing or two and a little bit of epoxy quickly transforms them into the same.
I also have some similar small plastic pieces from aluminum foil rolls that serve just as well for smaller rockets.
It's quite a lot of fun to re-purpose this kind of stuff for use in our rocketry endeavors.