TakaraTOMY or Hasbro MP Thundercracker?

If it's TakaraTOMY MP Thundercracker and you bought it in Japan and if you can speak Japanese or have a friend who can speak Japanese, then you can contact TakaraTOMY to get a replacement part. If you purchased it out of Japan, then contact the seller who should be able to source parts for you from TakaraTOMY. If it's a Hasbro MP Thundercracker... I don't know, I've never needed to source replacement parts for a Hasbro MP TF before; maybe contact Hasbro Australia's office in Epping? <shrug>