We found these online while searching for options, but $40.00 - $50.00 was too much for something my son will outgrow in a year. He liked the simple version without the belt but wanted the mask and cape. The belted one was a bit too loud for his taste.
this is the link for the simple version. for some reason I cannot hyperlink it.
Step 1: Head to the thrift shop
Zip up hoodie = $1.99
Donor sweatshirt = $.99
Next run home and begin.