Why is kernel-image-2.6.18-4-amd64 not available?

[Alvaro Polo Valdenebro <apv@tid.es>]

Hi,

I have a machine-in-production which is running a quite-old kernel in  
Debian Sarge, and I need to update it. Upgrading to Etch is not a  
chance, so I am trying to install a 2.6.18 kernel using Debian  
Backports. But, when I have a look to Backports web page...

   http://packages.debian.org/sarge-backports/linux-image-2.6-amd64

The package is not available!!! I am trying to extract some  
information from the web, but I cannot discover the reason because of  
this package is not available. Anyone could help me? Why this package  
is not available? Is there any alternative to obtain a recent, binary  
kernel for Debian Sarge?

Thanks in advance,

Álvaro Polo Valdenebro
Telefónica Investigación y Desarrollo
C/ Emilio Vargas 6
Madrid 28043
(+34) 91 337 39 29
apv@tid.es