Based on this product's specifications, here are some alternatives and similar models
Qoltec 51647 heat sink compound 3.17 W/m·K 5 g
Summary description:
Qoltec 51647. Thermal conductivity: 3.17 W/m·K, Product colour: Silver, Thermal resistance: 0.067 °C/W. Weight: 5 g. Quantity per pack: 1 pc(s)