Golf shafts for WS players:
If you're "dues paid" and you need one or two for sword cores, they're free.
If you want more, or are not dues paid, they're $2.
There are assorted lengths(short, med, long), both with and without handle grips. Some have directional handles, some don't.
Shield cores:
These are cut from plastic barrels, they are rectangular ~1.5ft x 3ft, and curved on the short sides and straight on the long sides, like a halfpipe for skateboards. Make excellent tower shields or kite shields. You can easily cut them with a sawzall/reciprocating saw, and mold/bend them with hot water to whatever shape you want. Blue or white.