I noticed, Krausse, you said 'you checked your kitchen cupboard' as if to say you weren't really sure exactly what you would find.
So the question is, are you really as organised as you say you are, or are you really like most of us. Just darned lucky to find the right bulb at the right time?
I've got some weird and wonderful light bulbs in a box from light units we had years ago and they don't fit anything now. I bet if I throw them out I'll get something they fit.