looking for tomcat 5.5.v rpm for AS4.0

[Yasushi Okubo]

Hi,  experts

I am looking for Redhat rpm for tomcat 5.5.x for our AS4.0 machine 
[Intel xenon].   Could someone advise me where I can find it ?  I looked 
around with google, but it looked to me that AS4.0 only has rpm for 
tomcat v5.0.x.  But we need to run tomcat v5.5.x.

Or do we need to wait for AS5.0 to come out ?   If possible, we would 
like to avoid to install binary from apache since I am not sure how easy 
to apply security patches for binary.

Thanks,
yasushi