Anyone know of a CPU shim that will work on a Barton core Athlon XP-M ?

[Dazed and Confused]

I was just wondering if anyone out there knew of a CPU shim that will work on my Barton core Athlon XP Mobile CPU. The only CPU shims I've found for Athlon XP's so far are only for the Thouroughbreds

 

[Killrose]

Why do you need a shim anyway's? I remember people using shims with the Thunderbird sktA core.

 

[Dazed and Confused]

Cause I don't have the felt pads for my SLK-900A and the core already has a tiny crack on a corner. Though the existing crack on my XP-M doesn't affect it in any way I can see I'd like to prevent further cracking.