I got a replacement Heatsink and Fan unit, but the OEM unit has the SUN Thermal Interface Material (TIM) already on the heatsink matting surface. Because mine is used it does not have the TIM. Also there are 2 different TIM material SUN used based on the Processor (1-1.28GHz uses a glue backed foil, 1.34-1.5GHz uses gray paste). I can't fine the SUN Thermal Interface Material, is there a proper Thermal paste I should use. (FYI, my process is a 1.5 Ghz)