I couldn't wait for the Mr. Naga to arrive, so went off looking for something similar.
I made the Jaflong tonight for tea using this which i found at our local Indian grocers.

I can't make a comparison until I try the Mr. naga, but it was a nice curry with a very distincive taste. i dipped my finger into the oil in the jar for a taste, and it was bloody hot.

Just wondered if anyone else knows/has used this product?