xazbrat wroteShould be able to find some at pcandparts, microcity or any other decent electronics store.
or you can build your own
DIY thermal paste ;)
I mixed vaseline and toothpaste with water almost a decade ago, it worked fine for ~3months.
Vaseline keeps the paste moist and prevent hardening, toothpaste has fluoride which is responsible for the thermal transfer afaik.