Question about Gundam Replacement parts

I was in the process of assembling my RG Crossbone Gundam, and I damaged or lost a lot of pieces too much too be able to assemble the head Unit. Is there anyway I can purchase new pieces from somewhere? Thanks

There are a few places on eBay where you can get replacement parts from. I’ve heard that you could contact BlueFin as well.

Bluefin? What’s that? Thanks by the way.

Bluefin Brands is the official US distributor for Bandai Models. They have a part replacement service. You just have to have an account with them:
https://www.bluefincorp.com/customer/account/login/referer/aHR0cHM6Ly93d3cuYmx1ZWZpbmNvcnAuY29tL2N1c3RvbWVyL2FjY291bnQvaW5kZXgv/