No longer in production by Sanyo, MCM offers high quality direct replacement IC's at a terrific price.
20-300 - Silicone Heat Sink Compound
Used for heat transfer from semiconductor devices to mounting points White Will not dry or harden 1 oz. tube
20-4505 - Heat Sink Compound - Five Pack 1 Gram Tubes
Five-pack of single use heat sink compound tubes Silicone base Thermal conductivity (K factor): .001 Temperature range: -40° to 400°F 1 gram per tube
MCM is a great company with a large selection of good quality products.