In needle of something

We're currently on a hunt for a needle, so we can get our shot of Olivia (Katrina) injecting herself. But, as we expected, it's not easy picking up a needle just anywhere.We're hoping with a note from the school to reassure the chemist that we are not using it for drug (we'll leave a phone number so they can call too) that they'll be generous enough to let us have one. Fingers crossed!