Vanille Absolue by La Maison de la Vanille perhaps.
I know about Demeter fragrances, but have heard they have terrible longevity and projection. Are there any other manufacturers/vendors that do a similar thing to Demeter, but with higher quality? I'm especially looking for an orange smell, but also seeking single-note chocolate, vanilla, etc.
Vanille Absolue by La Maison de la Vanille perhaps.
Pick up a bottle of Orange Sanguine from Atelier Cologne and call it a day.
"Christian Dior / You wasted your life
On aroma and clothes / Fabric and dyes." Christian Dior - Morrissey
Citruses usually are very fleeting. But there is stuff that at least lasts a bit more than Demeter. In addition to the suggestion above, there's Concentree d'orange vertes by Hermes. Vanilla instead lasts a long time, so there should be no problem there. One suggestion was given above already.
cacio
Bond No. 9 Little Italy is very very orange-y. Something you may want to look at. Not a good one IMO however.
the orange vert by hermes
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the orange vert by hermes
Eau d'Orange Verte is pretty linear and mostly bitter orange.
You may find what you crave in Diptyque's Eau de Tarocco/L'Eau de L'Eau.
Kurt smells like Teen Spirit
Comme des Garçons do pretty decent takes on grapefruit and lime. You might want to try Guerlain Mandarin-Basilic.