Try Lee Valley Tools. They have shelac in all sorts of colours. If there isn't one in your city, they also do internet/mail-order. (Beware though, visiting the store or the site can be hard on the wallet, so many cool tools and stuff).
I'm not sure which colour is closest (amber?). There should be a couple of threads on the subject, or ask Lou-the-pou, since he is the resident expert.