What is the best lilac fragrance?

I’d like to get lilac scented products as a gift for someone. However, I don’t know what application is appropriate. Body lotion, perfume, soap?

It’s important that the smell is pure and true to the delicate flower. (By this I mean not a blended fragrance- just straight up lilac) And if at all possible it would be great if it were a long lasting fragrance for someone who works 9 hours at a time and likes smelling good throughout the day.

very important: I’m talking about lilacs, NOT lavender.

I’ve been to two bath/fragrance stores where I’ve called ahead to confirm that they have lilac scented products and upon arrival the sales clerk has only lavender items. Upsetting.

Any brands, stores, advice would be much appreciated.