Black Dragon Hi-Capa 5.1 broken piece - metal replacement?

[maximemoring]

Hey everyone,

I need help with my Black Dragon Hi-Capa 5.1 as the under-barrel piece (plastic because of old canadian laws ) has severely cracked on the screw, and disassembling my gun to clean it up would mean that I wouldn't be able to put it back together as it would fall into pieces.

I'd like to know if it would be possible to switch this piece for a metal one and how/where to get that piece.

Thanks!