Support for alz and egg archives

[Sim Sum]

Hello,
in times of malware and phishing some senders use exotic compression 
methods.
https://en.wikipedia.org/wiki/ALZip and its successor .egg for example.
Debian has support to unpack alz via unalz 
https://packages.debian.org/jessie/unalz
So far i have not seen it in amavis.
Would it be much work to use this as a dependency besides unrar , unzip 
and unarj?
Regards,
Sim