I think if you have a LHS and they have trumpeter it would be a better chance to ask those guys for replacement parts, I have tried to contact Trumpeter but to no avail, however you can always try, they have a website so I'd bet there's a customer service section.
[View:http://www.trumpeter-china.com/plus/list.php?tid=7#:600:0]
there's a login/register section, you can give them feedback on their kits, I have never known any company to do this, and there's a contact us section at the bottom centre of the page, I think you have to register before contacting them. Good luck!