I have seen some cosplay suits on the Internet, if I understand you right. Even the masks, but I didn't find them really useful.
I saw the ones at PArty City and Target (same costume) and I don't like how they look like bellbottoms at the end of the leg
You mean like when Rag's sister stayed in his room with Leonard and dressed up as Star Trek characters and locked the door in The Big Bang Theory?
It's Halloweentime. Embrace your inner child and have fun. Go to a party and let the folks see Bumblebee bob for apples.