Justice
for Starhawk!
If you can't find the correct size to work with plastic - try styrofoam balls -- the kind kids use to make their solar system science project out of. Cut the ball in half and shove the half-sphere into the parachute. I did that a long tine ago with something. I think it was those not-G.I. Joes that were produced by that company that did all the really nice 1:18 military vehicles? Unimax maybe?
I did see some half Styrofoam balls there that I thought about using but they are hanging pretty high above my top shelf so it would be pretty visible.
I found some DIY plastic bird feeders that have a clear dome on top with a hole already in it and they worked perfectly after disassembling and taking the part I need. They were only $5.49 each so not too bad.