3D printed shield with a handle in the back, just like the original. Available in many colors and comes with a big star sticker you can put on. (Black and red also come with a patriotic sticker.)
Round shield $8 (USD)
Perfect for ninja or barbarians. Comes in many colors. Split in the back to help put on and take off.
1 pair of leg wraps $6 (USD)
Bandolier of boomerangs with 3 in the front and 3 in the back. Also comes with 2 loose bonus boomerangs to hold.
(Sorry, couldn't find Captain Boomerang for the picture)
Bandolier of bullets.