Sekisui PC Thermal tape. similar to what you get with thermalprobes small heatsinks ramsinks etc.
thermal conductive double sided tape 25mm wide
Great as a semi permanent method of attaching probes/heatsinks to mosfets. HDDs etc.
can be removed without damaging your components but strong enough to hold heatsinks etc to your components
Sold in 200mm strips. price is PER 25mm x 200mm strip. P & P is only paid once