Some places do sell stuff that has some age on it. Also go look at smokersforum as people on there often offer up baccy they want to sell for various reasons, often with some age.

Why not just do as a lot of pipe smokers do and regularly buy more than you need and cellar it? I've been doing that for a few years now and have some good stuff stashed away. Cheaper in the long run too as the prices are always on the up!

Gareth