Amazon sell various measuring spoons. There is a stainless steel set at Â£5.99.
Measurements are 1/8, 1/4, 1/2, 3/4, Teaspoon and Tablespoon. I've pasted the link but not too sure if I've done it right.
why not try wilko's or somewhere
most places that sell kitchenware sell plastic/metal measuring spoon sets
i have a plastic set i got from wilko that i use to measure dechlor, medication etc, cost less than Â£1 IIRC