dovecot - Aug 2009 - install sieve without any dovecot sources

Hi all

I have dovecot 1.1.16 (dovecot-1.1.16-0_94.el5 x86-64)  installed  on a 
Red Hat Enterprise v.5.

I am already using Dovecot's deliver for virtual users local delivery 
and need to install the cmusieve plugin
for the filtering capabilities.

I don't have any sources, since I installed Dovecot from a binary package.
Is there any way to install the cmusieve plugin?


Thanks in advance
Dimitrios Karapiperis