Megaman NT Warrior Costume. Help Needed!

[AkiraOmega]

Im pretty much done with the sword and buster.  But its the costume itself that im having trouble with.  Im trying to find a one piece jumpsuit(  if you know of any patterns please tell me it would really help and i would appreciate it so much!)  And im thinking that i could make the boots my covering up some Chuck Taylors or Vans.  But if anyone has a better way i could make them please do tell.  Also the biggest issue is the helmet.  Ive seen the toy helmets like 3-4 years ago.  Now i cant find them anywhere.  Does anyone have any suggestions for it?  Thanks to everyone who took the time to read this.  This is my first major costume with props. :D