For the past few months I've been using a copper shim between the GPU and heatsink of my laptop because there's a rather large (1mm~) gap between the two. The thing is getting rather hot, to the point where my hand would start numbing after touching the bottom for too long. I can't remember how the laptop was like prior to me taking it apart (for fun) to replace the TIM with MX-2. The laptop originally had a thermal pad between the GPU and heatsink, but that obviously ripped when I dismantled the laptop. I assume the gap is far too wide to simply fill up with TIM, but I'm sure there's a better solution than a flat copper shim because the heatsink base & GPU are not parallel, there's a slight slant, so I'm not sure how the contact is. It's also transferring heat between three layers (two layers of TIM and the copper), which has got to be hindering cooling. I've been trying to find high-quality thermal pads, but I can't seem to find any on popular tech shops. Maybe I'm just looking for the wrong thing (are they even thermal pads?) or they're just impossible to find. SOLUTIONS PLEASE!