Adhesive Thermal Pads for memory.. where to get replacements?

I have my old x1900xtx that I am looking to sell. However in eBay it seems the ones with stock cooling sell for more. To properly reinstall this I will need adhesive thermal pads for the memory chips. Does ANYONE know where I can buy some of these? or a sheet that I can cut squares out of? I can not find them anywhere.

Any help would be awesome.
 
I do not want thermal adhesive and it wont work putting the stock cooler back on. There is a gap between the memory and the cooler where the pad needs to go. They need to be pretty thick not paper thin like all the others ive seen.