I made all my own wings.
Treated pine pole, make a crows foot on the bottom with other timber and then nail cups (i just used short lengths of timber) at regular intervals. They have been known to fall over when not in use, but the jumping pole holds them upright.
If need be I can draw you a diagram.
These jump wings cost me about $5 each, + time to make.
My Number 1 Rule When Owning A Horse:
"HANG OUT WITH THEM AND BE THEIR BUDDY, THEN THEY'RE YOURS FOR LIFE"