Recently, I found a post office with some of the older issues of stamps. I was able to buy some.
This is the latest purchase from the little post office (not the one I used to go to on the first day of issue, that has now closed). The Genius of Gerry Anderson (I have watched Fireball XL5 and Stingray but do not recall Supercar), and also one of the crown jewels.
One of my penfriends decorates her letters with stamps. I keep forgetting to decorate with stickers.